During the tightly regulated gastrulation, embryonic cells differentiate into the three germ layers – endoderm, mesoderm, and ectoderm – which eventually give rise to all tissues and organs.

Among women hoping to avoid pregnancy, those who drank heavily faced a much higher risk of getting pregnant, while cannabis ...

If your pregnancy is high-risk, it means that you'll need special care – but you can still have a healthy pregnancy, labor, and delivery.