NIH study finds women spend longer in labor now than 50 years ago April 2012
- first stage of labor had increased by
2.6 hours for first-time mothers.
2.0 hours if previously given birth - epidural injections were used in more than half of recent deliveries, compared with 4 percent of deliveries in the 1960s. The study authors noted that epidural anesthesia is known to increase delivery time, but said it doesn’t account for all of the increase.
- Cesarean delivery was 4X more often (12 % vs. 3 %).
- Infants born 5 days earlier
- Compared birth data of 1959-1966 with 2002 - 2008.
Childbirth Study Sees Longer Labor as Normal New York Times Feb 2014
- normal second stage of labor is now longer than it was decades ago
Vitamin D is not mentioned in either of the studies
Also, could not easily find any studies for or against the assocation with vitamin D
See also VitaminDWiki
- Pregnancy category list
- Infant-Child category list
- Overview Pregnancy and vitamin D has the following summary
IU | Cumulative Benefit | Blood level | Cofactors | Calcium | $*/month |
200 | Better bones for mom with 600 mg of Calcium | 6 ng/ml increase | Not needed | No effect | $0.10 |
400 | Less Rickets (but not zero with 400 IU) 3X less adolescent Schizophrenia Fewer child seizures | 20-30 ng/ml | Not needed | No effect | $0.20 |
2000 | 2X More likely to get pregnant naturally/IVF 2X Fewer dental problems with pregnancy 8X less diabetes 4X fewer C-sections (>37 ng) 4X less preeclampsia (40 ng vs 10 ng) 5X less child asthma 2X fewer language problems age 5 | 42 ng/ml | Desirable | < 750 mg | $1 |
4000 | 2X fewer pregnancy complications 2X fewer pre-term births | 49 ng/ml | Should have cofactors | < 750 mg | $3 |
6000 | Probable: larger benefits for above items Just enough D for breastfed infant More maternal and infant weight | Should have cofactors | < 750 mg | $4 |