Reduced Fertilization rates in older men
On days where cervical mucus was not evident, intercourse for men in their late 30s and early 40s was 50% less likely to result in a clinical pregnancy, adjusting for intercourse timing and female age. As secretions become more conducive to sperm transport, the effect of male age diminishes steadily from 21% on days with damp secretions, to 11% on days with thick mucus, to only 4% on days with most fertile-type mucus. Continue reading→
Time to pregnancy & impact on the management of infertility
The likelihood of spontaneous conception in subsequent cycles is important for a balanced management of infertility. Previous studies on time to pregnancy are mostly retrospective and biased because of exclusion of truly infertile couples. The study aim was to present a non‐parametric estimation of cumulative probabilities of conception (CPC) in natural family planning (NFP) users Continue reading→
The timing of the “fertile window” in the menstrual cycle
In only about 30% of women is the fertile window entirely within the days of the menstrual cycle identified by clinical guidelines—that is, between days 10 and 17. Most women reach their fertile window earlier and others much later. Women should be advised that the timing of their fertile window can be highly unpredictable, even if their cycles are usually regular. Continue reading→
Day-specific probabilities of clinical pregnancy
Day-specific probabilities of clinical pregnancy based on two studies with imperfect measures of ovulation Authors: D.B. Dunson, D.D. Baird, A.J. Wilcox, C.R. Weinberg, Day-specific probabilities of clinical pregnancy based on two studies with imperfect measures of ovulation, Human Reproduction, Volume 14, Issue 7, 1 July 1999, Pages 1835–1839, https://doi.org/10.1093/humrep/14.7.1835 Two studies have related the timing... Continue reading→
Luteal Phase Deficiency and Anovulation in Recreational Women Runners
High Frequency of Luteal Phase Deficiency and Anovulation in Recreational Women Runners: Blunted Elevation in Follicle-Stimulating Hormone Observed during Luteal-Follicular Transition Authors: Mary Jane De Souza, B. E. Miller, A. B. Loucks, A. A. Luciano, L. S. Pescatello, C. G. Campbell, B. L. Lasley The Journal of Clinical Endocrinology & Metabolism, Volume 83, Issue 12,... Continue reading→
Post-ovulatory ageing of the human oocyte and embryo failure
Post-ovulatory ageing of the human oocyte and embryo failure Authors: Allen J. Wilcox, Clarice R. Weinberg, Donna D. Baird, Post-ovulatory ageing of the human oocyte and embryo failure, Human Reproduction, Volume 13, Issue 2, 1 February 1998, Pages 394–397, https://doi.org/10.1093/humrep/13.2.394 We carried out a prospective study of 221 healthy women who were attempting pregnancy. During... Continue reading→
Fertility Awareness in Women Attending a Fertility Clinic
Fertility Awareness in Women Attending a Fertility Clinic Authors: Blake D, Smith D, Bargiacchi A, France M, Gudex G. Fertility awareness in women attending a fertility clinic. Aust N Z J Obstet Gynaecol. 1997 Aug;37(3):350-2. doi: 10.1111/j.1479-828x.1997.tb02429.x. PMID: 9325525. Eighty women attending for consultation at a tertiary referral fertility unit over a 3-month period were... Continue reading→
Fertility Awareness and Natural family planning
Fertility Awareness and Natural family planning Authors: The European Journal of Contraception and Reproductive Health Care 2 (1997) 131–146 Fertility awareness and natural family planning M. M. Pyper Health Services Research Unit, Department of Public Health & Primary Care, Institute of Health Sciences, Oxford, UK Information about fertility awareness helps to fulfil the broader definition of the... Continue reading→
Timing of Sexual Intercourse in Relation to Ovulation
Timing of Sexual Intercourse in Relation to Ovulation — Effects on the Probability of Conception, Survival of the Pregnancy, and Sex of the Baby Authors: Allen J. Wilcox, M.D., Ph.D., Clarice R. Weinberg, Ph.D., and Donna D. Baird, Ph.D. December 7, 1995, N Engl J Med 1995; 333:1517-1521, DOI: 10.1056/NEJM199512073332301 BACKGROUND The timing of sexual... Continue reading→
Temporal relationships between indices of the fertile period
Temporal relationships between indices of the fertile period Authors: FERTILITY AND STERILITY Vol.29. No.5 May 1983 Copyright 1983 The American Fertility Society Printed in U.S.A World Health Organisation: Task Force on Methods for the Determination of the Fertile Period, Special Programme of Research, Development and Research Training in Human Reproduction. World Health Organisation. Geneva, Switzerland.... Continue reading→