Preterm birth risk increased 16 pcnt if heat wave (perhaps outside less) - Nov 2020

Heat Waves May Be Bad for Your Pregnancy New York Times Nov 16

• "There is a higher risk in pregnant women, and it’s much worse in poor women — anywhere people don’t have access to air-conditioning.”
• "There is a higher risk in pregnant women, and it’s much worse in poor women — anywhere people don’t have access to air-conditioning.”
• Based on "Associations between high temperatures in pregnancy and risk of preterm birth, low birth weight, and stillbirths: systematic review and meta-analysis"    PDF

---

No mention was made of staying out of the hot sun results in getting less Vitamin D

• Pre-term 368 items (not in PDF) as of Nov 2020
  • Preterm birth 3X more likely if low vitamin D – Oct 2018

Healthy pregnancies need lots of vitamin D has the following summary
Most were taking 2,000 to 7,000 IU daily for >50% of pregnancy
   Click on hyperlinks for details

Problem	Vit. D Reduces	Evidence
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		RCT
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