Association of preconception serum 25-hydroxyvitamin D concentrations with livebirth and pregnancy loss: a prospective cohort study
Lancet Diabetes and Endocrinology May 30, 2018 DOI:https://doi.org/10.1016/S2213-8587(18)30153-0
Sunni L Mumford mumfords at mail.nih.gov, PhD, Rebecca A Garbose, MD, Keewan Kim, PhDKerri Kissell, MDDaniel L Kuhr, MDUkpebo R Omosigho, MDNeil J Perkins, PhDNoya Galai, PhDRobert M Silver, MDLindsey A Sjaarda, PhDTorie C Plowden, MDEnrique F Schisterman, PhD
Conception and Vitamin D
- Birth rates doubled with Vitamin D - 300,000 loading dose for men – RCT Nov 2017
- The earlier the better- preconception vitamin D - June 2018
- Many fertility disorders associated with low vitamin D, still unsure how much is needed – Dec 2016
Fertility and Sperm category contains the following summary
Overview Women and Vitamin D
Overview Pregnancy and vitamin D Fertility and Vitamin D – several articles
Ensure a healthy pregnancy and baby - take Vitamin D before conception
Search VitaminDWiki for IVF OR "IN VITRO FERTILIZATION" 345 items as of Sept 2019
Search VitaminDWiki for "Assisted reproduction" 177 items as of Sept 2019
Search VitaminDWiki for "polycystic ovary syndrome" OR PCOS" Sept 2019
Search VitaminDWiki fore Testosterone 77 items just in webpages as of Sept 2020
Search VitaminDWiki for "erectile dysfunction" 120 items as of July 2018
Conception and vitamin D snapshot as of 2012
Healthy pregnancies need lots of vitamin D has the following summary
|0. Chance of not conceiving||3.4 times||Observe|
|1. Miscarriage||2.5 times||Observe|
|2. Pre-eclampsia||3.6 times||RCT|
|3. Gestational Diabetes||3 times||RCT|
|4. Good 2nd trimester sleep quality||3.5 times||Observe|
|5. Premature birth||2 times||RCT|
|6. C-section - unplanned||1.6 times||Observe|
|Stillbirth - OMEGA-3||4 times||RCT - Omega-3|
|7. Depression AFTER pregnancy||1.4 times||RCT|
|8. Small for Gestational Age||1.6 times||meta-analysis|
|9. Infant height, weight, head size |
within normal limits
|10. Childhood Wheezing||1.3 times||RCT|
|11. Additional child is Autistic||4 times||Intervention|
|12.Young adult Multiple Sclerosis||1.9 times||Observe|
|13. Preeclampsia in young adult||3.5 times||RCT|
|14. Good motor skills @ age 3||1.4 times||Observe|
|15. Childhood Mite allergy||5 times||RCT|
|16. Childhood Respiratory Tract visits||2.5 times||RCT|
RCT = Randomized Controlled Trial
PDF is available free at Sci-Hub 10.1016/S2213-8587(18)30153-0
Vitamin D deficiency during pregnancy is associated with adverse pregnancy outcomes, although the association between preconception vitamin D concentrations and livebirth is unknown. We aimed to assess the association between preconception vitamin D and pregnancy outcomes among women with proven fecundity.
We did a secondary analysis of a prospective cohort from the block-randomised, double-blind, placebo-controlled EAGeR trial. Women aged 18–40 years with one to two previous pregnancy losses were recruited from June 15, 2007, to July 15, 2011, at four clinical sites in the USA and followed up for up to six menstrual cycles while attempting pregnancy and throughout pregnancy if they conceived. Serum 25-hydroxyvitamin D was measured at baseline (preconception) and 8 weeks of gestation. Outcomes of interest included clinical pregnancy, time to pregnancy, pregnancy loss, and livebirths. Risk ratios (RRs) and 95% CIs for livebirths, pregnancy, and pregnancy loss were estimated with weighted log-binomial regression. To assess time to pregnancy, we used discrete time Cox proportional hazards models to calculate fecundability odds ratios (FORs) with 95% CIs. EAGeR is registered with ClinicalTrials.gov, number NCT00467363.
1191 women had available data on preconception 25-hydroxyvitamin D concentrations. 555 (47%) women were classified as having sufficient concentrations (≥75 nmol/L) and 636 (53%) as having insufficient concentrations (<75 nmol/L).
Women with sufficient preconception 25-hydroxyvitamin D were more likely to
- achieve clinical pregnancy (adjusted RR 1.10 [1·01–1·20])
- and livebirth (1.15 [95% CI 1·02–1·29])
than were women with insufficient concentrations. Among women who achieved pregnancy, sufficient preconception 25-hydroxyvitamin D, but not that at 8 weeks of gestation, was associated with reduced risk of pregnancy loss (preconception RR per 25 nmol/L 0·88 [95% CI 0·77–0·99]; 8 weeks of gestation 0·98 [0·95–1·01]). No association was observed with fecundability in women with sufficient versus those with insufficient preconception 25-hydroxyvitamin D concentrations (adjusted FOR 1·13 [95% CI 0·95–1·34]).
Sufficient preconception 25-hydroxyvitamin D (≥75 nmol/L) was associated with increased likelihood of pregnancy and livebirth. Increased vitamin D concentrations before conception, but not in early pregnancy, were associated with reduced pregnancy loss.
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