"Fetal development" refers to the growth and progress of a baby inside its mother's womb before it is born. It involves the formation of organs, body parts, and systems essential for a healthy baby's development. Full definition
Significant aspects of fetal development begin during this week, including development of the brain, spinal cord, heart, and gastrointestinal tract. (doctor-info.website)
B vitamins such as folic acid and B6 are involved in DNA synthesis and repair, and cell replication, which is why they play such an important role in fetal development. (liveinthenow.com)
Here's a weekly calendar of events for fetal development during the third trimester. (mayoclinic.org)