C B Lambalk

Summary

Affiliation: University Hospital Vrije Universiteit
Country: The Netherlands

Publications

  1. ncbi Hypothetical risks of twinning in the natural menstrual cycle
    C B Lambalk
    Division of Reproductive Endocrinology, Vrije Universiteit, Amsterdam, The Netherlands
    Eur J Obstet Gynecol Reprod Biol 75:1-4. 1997
  2. ncbi Increased levels and pulsatility of follicle-stimulating hormone in mothers of hereditary dizygotic twins
    C B Lambalk
    Division of Reproductive Endocrinology, Free University, Amsterdam, The Netherlands
    J Clin Endocrinol Metab 83:481-6. 1998
  3. ncbi Interpretation of elevated FSH in the regular menstrual cycle
    C B Lambalk
    Department of Obstetrics and Gynaecology, Vrije Universiteit, Amsterdam, The Netherlands
    Maturitas 30:215-20. 1998
  4. ncbi The endocrinology of dizygotic twinning in the human
    C B Lambalk
    Research Institute of Endocrinology, Reproduction and Metabolism, Department of Obstetrics and Gynaecology, Medical Centre, Vrije Universiteit, Amsterdam, The Netherlands
    Mol Cell Endocrinol 145:97-102. 1998
  5. ncbi Genetic risk factors in tumours of the testis: lessons from twin studies
    C B Lambalk
    Research Institute for Endocrinology, Reproduction and Metabolism, Department of Obstetrics Gynaecology, Academic Hospital, Free University, Amsterdam, The Netherlands
    Twin Res 1:154-5. 1998
  6. ncbi Natural versus induced twinning and pregnancy outcome: a Dutch nationwide survey of primiparous dizygotic twin deliveries
    C B Lambalk
    Research Institute of Endocrinology, Reproduction and Metabolism, Department of Obstetrics and Gynaecology, Medical Centre Vrije Universiteit, Amsterdam, The Netherlands
    Fertil Steril 75:731-6. 2001
  7. doi A reduced size of the ovarian follicle pool is associated with an increased risk of a trisomic pregnancy in IVF-treated women
    M L Haadsma
    Department of Obstetrics and Gynaecology, University Medical Center Groningen, University of Groningen, PO Box 30 001, 9700 RB Groningen, The Netherlands
    Hum Reprod 25:552-8. 2010
  8. ncbi Factors determining early pregnancy loss in singleton and multiple implantations
    M J Lambers
    Department of Obstetrics, Gynecology and Reproductive Medicine, Vrije University Medical Center, Amsterdam, The Netherlands
    Hum Reprod 22:275-9. 2007
  9. ncbi Further considerations on natural or mild hyperstimulation cycles for intrauterine insemination treatment: effects on pregnancy and multiple pregnancy rates
    A J Goverde
    Vrije Universiteit Medical Centre, Department of Reproductive Medicine, Division of Obstetrics and Gynaecology, Amsterdam, The Netherlands
    Hum Reprod 20:3141-6. 2005
  10. ncbi Factors associated with dizygotic twinning after IVF treatment with double embryo transfer
    E Groeneveld
    Centre for Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Centre, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 27:2966-70. 2012

Collaborators

Detail Information

Publications48

  1. ncbi Hypothetical risks of twinning in the natural menstrual cycle
    C B Lambalk
    Division of Reproductive Endocrinology, Vrije Universiteit, Amsterdam, The Netherlands
    Eur J Obstet Gynecol Reprod Biol 75:1-4. 1997
    ..However, prospective experiments will be needed to prove the relation between this type of DZ twinning and possible patterns of serum FSH that mimic puberty under these circumstances...
  2. ncbi Increased levels and pulsatility of follicle-stimulating hormone in mothers of hereditary dizygotic twins
    C B Lambalk
    Division of Reproductive Endocrinology, Free University, Amsterdam, The Netherlands
    J Clin Endocrinol Metab 83:481-6. 1998
    ..This is the result of altered responsiveness to ovarian feedback and/or pituitary or suprapituitary, non-LHRH-like mechanisms that stimulate pulsatile FSH...
  3. ncbi Interpretation of elevated FSH in the regular menstrual cycle
    C B Lambalk
    Department of Obstetrics and Gynaecology, Vrije Universiteit, Amsterdam, The Netherlands
    Maturitas 30:215-20. 1998
    ....
  4. ncbi The endocrinology of dizygotic twinning in the human
    C B Lambalk
    Research Institute of Endocrinology, Reproduction and Metabolism, Department of Obstetrics and Gynaecology, Medical Centre, Vrije Universiteit, Amsterdam, The Netherlands
    Mol Cell Endocrinol 145:97-102. 1998
    ....
  5. ncbi Genetic risk factors in tumours of the testis: lessons from twin studies
    C B Lambalk
    Research Institute for Endocrinology, Reproduction and Metabolism, Department of Obstetrics Gynaecology, Academic Hospital, Free University, Amsterdam, The Netherlands
    Twin Res 1:154-5. 1998
    ..We suggest to study FSH secretion in males of familial dizygotic twins and furthermore the risk of developing testicular carcinoma in males with elevated FSH. These men with one testicle and/or with dysfunctioning Sertoli/Leydig cells...
  6. ncbi Natural versus induced twinning and pregnancy outcome: a Dutch nationwide survey of primiparous dizygotic twin deliveries
    C B Lambalk
    Research Institute of Endocrinology, Reproduction and Metabolism, Department of Obstetrics and Gynaecology, Medical Centre Vrije Universiteit, Amsterdam, The Netherlands
    Fertil Steril 75:731-6. 2001
    ..To compare obstetrical outcome of twin pregnancies after assisted reproduction with that of natural twin pregnancies...
  7. doi A reduced size of the ovarian follicle pool is associated with an increased risk of a trisomic pregnancy in IVF-treated women
    M L Haadsma
    Department of Obstetrics and Gynaecology, University Medical Center Groningen, University of Groningen, PO Box 30 001, 9700 RB Groningen, The Netherlands
    Hum Reprod 25:552-8. 2010
    ..It has been hypothesized that the increase in meiotic errors is related to the decreasing number of oocytes with age. Our aim was to assess the relation between trisomic pregnancy and three parameters of oocyte quantity...
  8. ncbi Factors determining early pregnancy loss in singleton and multiple implantations
    M J Lambers
    Department of Obstetrics, Gynecology and Reproductive Medicine, Vrije University Medical Center, Amsterdam, The Netherlands
    Hum Reprod 22:275-9. 2007
    ..The incidence of first trimester pregnancy loss is much lower in IVF twin pregnancies than in IVF singleton pregnancies. The objective of this study was to determine which embryonic and maternal factors contribute to this finding...
  9. ncbi Further considerations on natural or mild hyperstimulation cycles for intrauterine insemination treatment: effects on pregnancy and multiple pregnancy rates
    A J Goverde
    Vrije Universiteit Medical Centre, Department of Reproductive Medicine, Division of Obstetrics and Gynaecology, Amsterdam, The Netherlands
    Hum Reprod 20:3141-6. 2005
    ....
  10. ncbi Factors associated with dizygotic twinning after IVF treatment with double embryo transfer
    E Groeneveld
    Centre for Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Centre, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 27:2966-70. 2012
    ....
  11. doi Clomiphene citrate resistance in relation to follicle-stimulating hormone receptor Ser680Ser-polymorphism in polycystic ovary syndrome
    A Overbeek
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 24:2007-13. 2009
    ..The objective of this study was to evaluate the role of the follicle-stimulating hormone receptor (FSHR) Ser680Ser-polymorphism as a predictor for CC response...
  12. ncbi The paradox of declining fertility but increasing twinning rates with advancing maternal age
    S N Beemsterboer
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Vrije University Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 21:1531-2. 2006
    ..Advancing female age is associated with declining fertility potential due to decreasing numbers and quality of oocytes but also with a distinct increase in dizygotic twinning rates, a phenomenon that has never been explained...
  13. ncbi Recombinant LH supplementation to a standard GnRH antagonist protocol in women of 35 years or older undergoing IVF/ICSI: a randomized controlled multicentre study
    T E König
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center VUmc, PO Box 7057, Amsterdam 1007 MB, The Netherlands
    Hum Reprod 28:2804-12. 2013
    ..Does the addition of exogenous LH to an IVF/ICSI stimulation protocol with recombinant FSH (r-FSH) and a GnRH antagonist improve the ovarian response and pregnancy rates in women of 35 years and older?..
  14. ncbi Are elevated FSH concentrations in the pre-conceptional period a risk factor for Down's syndrome pregnancies?
    J M van Montfrans
    Research Institute for Endocrinology, Reproduction and Metabolism, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 16:1270-3. 2001
    ..However, when elevated basal FSH concentrations are diagnosed during subfertility evaluation, an elevated risk for a Down's syndrome pregnancy could be discussed with women who become pregnant...
  15. ncbi Are GnRH antagonists comparable to agonists for use in IVF?
    J A Huirne
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, 1007 MB, Amsterdam, The Netherlands
    Hum Reprod 22:2805-13. 2007
    ..More studies comparing long GnRH agonist protocols with 'long' GnRH antagonist protocols, with enough power to identify differences in pregnancy rates, are required before appropriate comparison can be made...
  16. ncbi Intercycle variability of ovarian reserve tests: results of a prospective randomized study
    J Kwee
    Division of Reproductive Endocrinology and Fertility and the IVF Centre, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, PO Box 7057, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 19:590-5. 2004
    ....
  17. doi Preconceptional low-dose aspirin for the prevention of hypertensive pregnancy complications and preterm delivery after IVF: a meta-analysis with individual patient data
    E Groeneveld
    Department of Obstetrics and Gynaecology, Centre for Reproductive Medicine, VU University Medical Centre, P O Box 7057, Amsterdam 1007 MB, The Netherlands
    Hum Reprod 28:1480-8. 2013
    ..Does preconceptionally started low-dose aspirin prevent hypertensive pregnancy complications and preterm delivery in IVF patients?..
  18. ncbi Elevated FSH concentrations in imminent ovarian failure are associated with higher FSH and LH pulse amplitude and response to GnRH
    C H de Koning
    Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, PO Box 7057, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 15:1452-6. 2000
    ..We concluded that in women with IOF, the pituitary is more sensitive to GnRH. This leads to higher FSH and LH pulse amplitudes which underlie the elevated FSH concentrations in the early follicular phase...
  19. doi The endocrine and follicular growth dynamics throughout the menstrual cycle in women with consistently or variably elevated early follicular phase FSH compared with controls
    C H de Koning
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, PO Box 7057, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 23:1416-23. 2008
    ....
  20. ncbi Gonadotrophin-releasing hormone agonist dose-dependency of pituitary desensitization during controlled ovarian hyperstimulation in IVF
    R M Janssens
    Institute for Endocrinology, Reproduction and Metabolism, IVF Center, Free University Hospital, Amsterdam, The Netherlands
    Hum Reprod 13:2386-91. 1998
    ..Thus, a daily s.c. dose of 100 microg triptorelin acetate appears to be too high, since adequate desensitization of the pituitary (i.e. no spontaneous LH surge) can be achieved with doses as low as 15 and 50 microg...
  21. ncbi Basal FSH concentrations as a marker of ovarian ageing are not related to pregnancy outcome in a general population of women over 30 years
    J M van Montfrans
    Research Institute for Endocrinology, Reproduction and Metabolism, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 19:430-4. 2004
    ..Since the majority of aneuploid conceptions end in early pregnancy loss or abortion of a recognized pregnancy, these determinants are appropriate intermediate end-points to study aneuploidy...
  22. ncbi Ovarian response to standard gonadotrophin stimulation for IVF is decreased not only in older but also in younger women in couples with idiopathic and male subfertility
    A J Goverde
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 20:1573-7. 2005
    ....
  23. doi Frequency distribution of polymorphisms in the FSH receptor gene in infertility patients of different ethnicity
    E A M Kuijper
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center, Amsterdam, The Netherlands
    Reprod Biomed Online 20:588-93. 2010
    ..This indicates that, when comparing allelic frequency distributions of the FSHR polymorphism variants, ethnic background should be accounted for. FSH concentrations did not differ between FSHR polymorphisms or between ethnic groups...
  24. doi Pituitary sensitizing effect of GnRH antagonists: a mechanism explaining LH escape during IVF?
    F R Banga
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Centre VUmc, PO Box 7075, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 25:1513-9. 2010
    ..We hypothesize that, under chronic GnRH antagonist administration, a higher pituitary response to GnRH could be an underlying mechanism explaining the escape phenomenon...
  25. ncbi Frequency distribution of polymorphisms in the FSH receptor gene in infertility patients of different ethnicity
    E A M Kuijper
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center, Amsterdam, The Netherlands
    Reprod Biomed Online 22:S60-5. 2011
    ..This indicates that, when comparing allelic frequency distributions of the FSHR polymorphism variants, ethnic background should be accounted for. FSH concentrations did not differ between FSHR polymorphisms or between ethnic groups...
  26. doi Clomifene citrate or low-dose FSH for the first-line treatment of infertile women with anovulation associated with polycystic ovary syndrome: a prospective randomized multinational study
    R Homburg
    Reproductive Medicine, VU University Medical Center, Amsterdam, The Netherlands
    Hum Reprod 27:468-73. 2012
    ..Low-dose FSH has been reserved for women failing to conceive with CC. In this RCT, we tested the hypothesis that pregnancy rate (PR) and live birth rates (LBR) are higher after OI with low-dose FSH than with CC as first-line treatment...
  27. doi Insulin-induced capillary recruitment is impaired in both lean and obese women with PCOS
    I J G Ketel
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, De Boelelaan 1118, Room OZ116 1, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 26:3130-7. 2011
    ..Insulin-induced capillary recruitment (IICR) is considered a significant determinant of IMGU. We investigated whether IICR is a determinant IMGU in obese and lean women with and without PCOS...
  28. ncbi LH as a diagnostic criterion for polycystic ovary syndrome in patients with WHO II oligo/amenorrhoea
    M L Hendriks
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center, PO Box 7057, 1007 MB Amsterdam, The Netherlands
    Reprod Biomed Online 16:765-71. 2008
    ....
  29. doi Metabolomic profiling by near-infrared spectroscopy as a tool to assess embryo viability: a novel, non-invasive method for embryo selection
    C G Vergouw
    Department of Obstetrics, Gynaecology and Reproductive Medicine, VU University Medical Center, Amsterdam, The Netherlands
    Hum Reprod 23:1499-504. 2008
    ..In this study, we investigated if metabolomic profiling of biomarkers of embryo culture medium by near-infrared (NIR) spectroscopy has a correlation with ongoing pregnancy in SET...
  30. ncbi The distribution of FSH receptor isoforms is related to basal FSH levels in subfertile women with normal menstrual cycles
    C H de Koning
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, P O Box 7057, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 21:443-6. 2006
    ..The aim of our study was to test the hypothesis that this receptor isoform occurs more often in regularly menstruating subfertility patients with elevated basal FSH than in those with normal early follicular phase FSH...
  31. ncbi Heritability of reproductive hormones in adult male twins
    E A M Kuijper
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 22:2153-9. 2007
    ....
  32. ncbi Cetrorelix in an oral contraceptive-pretreated stimulation cycle compared with buserelin in IVF/ICSI patients treated with r-hFSH: a randomized, multicentre, phase IIIb study
    J A Huirne
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 21:1408-15. 2006
    ..The aim of this study was to assess the non-inferiority of an oral contraceptive (OC)-pretreated cetrorelix regimen and a buserelin regimen in IVF/ICSI patients treated with r-hFSH in terms of total number of oocytes retrieved...
  33. doi Reproductive hormone concentrations in pregnancy and neonates: a systematic review
    E A M Kuijper
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center VUmc, 1007 MB Amsterdam, The Netherlands
    Reprod Biomed Online 27:33-63. 2013
    ..In conclusion, longitudinally measured endocrine data during gestation and in the peri- and post-natal period are lacking, especially for twin pregnancies...
  34. ncbi Heritability of polycystic ovary syndrome in a Dutch twin-family study
    J M Vink
    Department of Biological Psychology, Vrije Universiteit, Van de Boechorststraat 1, 1081 BT Amsterdam, The Netherlands
    J Clin Endocrinol Metab 91:2100-4. 2006
    ..Polycystic ovary syndrome (PCOS) is one of the most common endocrine disorders among women of reproductive age. There is evidence for a genetic component in PCOS based on familial clustering of cases...
  35. ncbi Treatment with the GnRH antagonist ganirelix prevents premature LH rises and luteinization in stimulated intrauterine insemination: results of a double-blind, placebo-controlled, multicentre trial
    C B Lambalk
    Department of Reproductive Medicine, Vrije Universiteit Medical Centre, Amsterdam, The Netherlands, and Civic Parkdale Clinic, Ottawa, Ontario, Canada
    Hum Reprod 21:632-9. 2006
    ..This study was designed to assess whether the use of ganirelix in women undergoing stimulated IUI could prevent the occurrence of premature LH rises and luteinization (LH+progesterone rises)...
  36. ncbi Birth weight and age at menarche in patients with polycystic ovary syndrome or diminished ovarian reserve, in a retrospective cohort
    S Sadrzadeh
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 18:2225-30. 2003
    ..In most patients this was concomitant with elevated serum LH levels. Diminished ovarian reserve was defined as receiving a donated oocyte or having a low response to ovarian hyperstimulation...
  37. ncbi Why does ovarian surgery in PCOS help? Insight into the endocrine implications of ovarian surgery for ovulation induction in polycystic ovary syndrome
    M L Hendriks
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center, Amsterdam, The Netherlands
    Hum Reprod Update 13:249-64. 2007
    ..Additionally, anti-Müllerian hormone and gonadotrophin surge attenuating factor probably have a role in the endocrine changes...
  38. ncbi Potential bias regarding birth weight in historical and contemporary twin data bases
    S Sadrzadeh
    Department of Obstetrics and Gynaecology, VU Medical Centre, The Netherlands
    Twin Res 4:332-6. 2001
    ..We suggest that investigators using historical databases to test the fetal origins hypothesis should be aware of this increased likelihood of selective exclusion of individuals with extreme morphometric parameters at time of birth...
  39. ncbi Assessment of ovarian reserve. Ovarian biopsy is not a valid method for the prediction of ovarian reserve
    C B Lambalk
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 19:1055-9. 2004
    ..We concluded that due to the huge variation in the distribution of follicles across the surface of the ovary, there is no place for this procedure in clinical evaluation of reproductive ageing in the individual patient...
  40. doi Health-related quality of life in women with newly diagnosed polycystic ovary syndrome randomized between clomifene citrate plus metformin or clomifene citrate plus placebo
    E Moll
    Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Amsterdam, The Netherlands
    Hum Reprod 27:3273-8. 2012
    ..What is the health-related quality of life (HRQoL) in women with polycystic ovary syndrome (PCOS) undergoing ovulation induction with clomifene citrate (CC) combined with metformin compared with those using CC combined with placebo?..
  41. ncbi Gonadotropin-releasing-hormone-receptor antagonists
    J A Huirne
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, PO Box 7057, 1007MB, Amsterdam, Netherlands
    Lancet 358:1793-803. 2001
    ..However, the best clinical evidence so far has been in assisted reproduction and prostate cancer...
  42. doi Greater arterial stiffness in polycystic ovary syndrome (PCOS) is an obesity--but not a PCOS-associated phenomenon
    I J Ketel
    Division of Reproductive Medicine, Department of Obstetrics and Gynecology, Vrije Universiteit Medical Centre VU, Amsterdam, The Netherlands
    J Clin Endocrinol Metab 95:4566-75. 2010
    ..Polycystic ovary syndrome (PCOS) and obesity are associated with cardiovascular disease, but it is unclear to what extent they contribute independently. Arterial stiffness might link obesity and PCOS to cardiovascular diseases...
  43. doi Testing ovarian reserve to predict age at menopause
    C B Lambalk
    Division of Reproductive Medicine, Department of Obstetrics Gynaecology, Vrije Universiteit Medical Center, Amsterdam, The Netherlands
    Maturitas 63:280-91. 2009
    ..Results of new and ongoing longitudinal studies may provide better predictive models. In particular, use of genetic profiles may add to the accuracy of currently known markers...
  44. ncbi Comparison of endocrine tests with respect to their predictive value on the outcome of ovarian hyperstimulation in IVF treatment: results of a prospective randomized study
    J Kwee
    Research Institute for Endocrinology, Reproduction and Metabolism, Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Fertility, Vrije Universiteit Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 18:1422-7. 2003
    ....
  45. doi Purification of a candidate gonadotrophin surge-inhibiting/attenuating factor (GnSIF/AF) showing MAPK as a possible target
    M L Hendriks
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, VU University Medical Center, Amsterdam, The Netherlands
    Mol Reprod Dev 78:292-304. 2011
    ..The results provide strong evidence that the identified candidate proteins are the true GnSIF/AF...
  46. ncbi Basal FSH, estradiol and inhibin B concentrations in women with a previous Down's syndrome affected pregnancy
    J M van Montfrans
    Research Institute for Endocrinology, Reproduction and Metabolism, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Centre, Amsterdam, The Netherlands
    Hum Reprod 17:44-7. 2002
    ..However, it is not known whether these elevated basal FSH concentrations reflect depletion of the primordial follicle pool, or were caused by an increased secretory drive for FSH...
  47. doi No evidence that embryo selection by near-infrared spectroscopy in addition to morphology is able to improve live birth rates: results from an individual patient data meta-analysis
    C G Vergouw
    Department of Obstetrics and Gynaecology, VU University Medical Center, Amsterdam, The Netherlands
    Hum Reprod 29:455-61. 2014
    ..embryo selection by metabolomic profiling of culture medium with near-infrared (NIR) spectroscopy as an adjunct to morphology, compared with embryo selection by morphology alone, based on an individual patient data meta-analysis (IPD MA)?..
  48. doi Ultrasonographically measured testicular volumes in 0- to 6-year-old boys
    E A M Kuijper
    Division of Reproductive Medicine, Department of Obstetrics and Gynaecology, Vrije Universiteit Medical Center, 1007 MB Amsterdam, The Netherlands
    Hum Reprod 23:792-6. 2008
    ..Therefore, the aim of this study was to obtain ultrasonographically measured normative data for testicular volumes in 0- to 6-year-old boys...