Seasonal Variability in Fertilization and Embryo Quality Rates in Women Undergoing IVF

Rojansky, Nathan; Benshushan, Abraham; Meirsdorf, Samuel; Lewin, Aby; Laufer, Neri; Safran, Anat

doi:10.1016/s0015-0282(00)01466-7

Cited by 7 publications

(6 citation statements)

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“…A similar study carried out by Rojansky et al [4] shows seasonal variation in ART pregnancy outcomes. Other studies [5][6][7][8] also showed some seasonal variability in ART cycles.…”

Section: Introductionsupporting

confidence: 56%

Season Variability in Pregnancy and Live Birth Rates for Women Undergoing Assisted Reproductive Technique: A Retrospective Study

Abdelwehab¹,

Abdelnasser²,

Samy³

2018

Gynecol Reprod Health

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Objectives: Investigation for seasonal variability in pregnancy and live birth rates among women undergoing Assisted Reproductive Techniques (ART). Design:We did a retrospectives study of the pregnancy, implantation and live birth rates of the women who did ART in our centre over the past three years, 2014-2016. During that time 1451 patients had ICSI cycles. We selected 1219 patients from these for the purpose of this study.Patient selection criteria were women under 35 years of age and where ejaculated semen was used over a count of 1,000,000/ml or more. We analysed pregnancy, miscarriage and live birth rates according to the seasons patients had their cycle to accurately try to pinpoint if there was a favorable time of the year that increased pregnancy rates. Results:There was no significance difference in pregnancy, miscarriage and live birth rates between the four seasons.Conclusions: Seasonality does not seem to affect pregnancy and live birth rates. It should not be taken into account for patients seeking ART.

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“…A similar study carried out by Rojansky et al [4] shows seasonal variation in ART pregnancy outcomes. Other studies [5][6][7][8] also showed some seasonal variability in ART cycles.…”

Section: Introductionsupporting

confidence: 56%

Season Variability in Pregnancy and Live Birth Rates for Women Undergoing Assisted Reproductive Technique: A Retrospective Study

Abdelwehab¹,

Abdelnasser²,

Samy³

2018

Gynecol Reprod Health

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“…Studies on in vitro fertilization (IVF) programs report seasonal variations both in the rate of fertilization and in embryo quality, showing a positive relation to the increase of daylight throughout the year (Rojansky et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

De novo chromosomal abnormalities and month of conception

et al. 2006

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The relationship between chromosomal abnormalities and the month of conception could turn out to be useful in estimating the actual risk in pregnancy, if confirmed by other studies. The observed June lowest rate might indicate an association between chromosomal abnormalities and the maximum number of daylight hours throughout the year (summer solstice). We cannot explain the unusual findings concerning Robertsonian translocations that were only found for conceptions in December. This may be related to the annual minimum daylight hours (winter solstice) as opposed to the summer solstice.

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“…The evidence for an association between vitamin D and reproduction derives from studies, which indicated a seasonal variability in pregnancy rates and quality of embryo rates after IVF, with the highest values to occur during spring and the lowest during autumn. This variability was associated with the total number of light hours (22), as, in northern coun-tries, reduced ovulation rates and endometrial receptivity have been observed during long and dark winters, in contrast to increased conception and multiple pregnancy rates during summer. The observed variability was not explained by differences in the frequency of intercourse (23).…”

Section: The Physiological Role Of Vitamin D In Reproductionmentioning

confidence: 98%