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Autism risk increased if short time between pregnancies (no surprise) – April 2016

Short gap between pregnancies tied to higher autism risk? HealthDay News

  • Recommended at least 2 years
  • “study author Dr. Agustin Conde-Agudelo. He is a researcher at the World Health Organization Collaborating Center in Human Reproduction at the University of Valle in Cali, Colombia.”
  • “The study was published online April 7 and in the May print issue of the journal Pediatrics.”

Article does not say how much increase
Study probably does, but was not online as of April 8, 2016

Previous study found 2X Autism increase if < 12 months - July 2015

Inter-Pregnancy Intervals and the Risk of Autism Spectrum Disorder: Results of a Population-Based Study.
J Autism Dev Disord. 2015 Jul;45(7):2056-66. doi: 10.1007/s10803-015-2368-y.
Durkin MS1, DuBois LA, Maenner MJ.
1Department of Population Health Sciences, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, 789 WARF, 610 Walnut Street, Madison, WI, 53726, USA, mdurkin at wisc.edu.

Recent studies have reported an increased risk of autism among second-born children conceived <12 versus >36 months after the birth of a sibling. Confirmation of this finding would point to inter-pregnancy interval (IPI) as a potentially modifiable risk factor for autism. This study evaluated the relationship between IPI and autism spectrum disorder (ASD) risk in a Wisconsin birth cohort of 31,467 second-born children, of whom 160 resided in the study area and were found to have ASD at age 8 years. In adjusted analyses, both short (<12) and long (>84 month) IPIs were associated with a two-fold risk of ASD relative to IPIs of 24-47 months (p < 0.05). The long IPI association was partially confounded by history of previous pregnancy loss.

PMID: 25636677 available at DeepDive

See also VitaminDWiki

Healthy pregnancies need lots of vitamin D has the following summary

0. Chance of not conceiving3.4 times Observe
1. Miscarriage 2.5 times Observe
2. Pre-eclampsia 3.6 timesRCT
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 timesObserve
     Stillbirth - OMEGA-3 4 timesRCT - 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 timesObserve
13. Preeclampsia in young adult 3.5 timesRCT
14. Good motor skills @ age 31.4 times Observe
15. Childhood Mite allergy 5 times RCT
16. Childhood Respiratory Tract visits 2.5 times RCT

RCT = Randomized Controlled Trial

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