Question

What are the three periods of prenatal development? What major milestones occur in each period?

a) Germinal, Embryonic, Fetal - Implantation, Organ Formation, Birth
b) Early, Middle, Late - Fertilization, Brain Development, Birth
c) Preconception, Conception, Postconception - Cell Division, Organogenesis, Parturition
d) Neonatal, Infant, Toddler - Crawling, Walking, Talking

Answer 1

The three periods of prenatal development are germinal, embryonic, and fetal, with major milestones occurring in each period.

Step-by-step explanation:

The three periods of prenatal development are: germinal, embryonic, and fetal.

In the germinal stage, which occurs during the first two weeks after fertilization, the major milestone is implantation, when the blastocyst implants in the uterus.

In the embryonic stage, which lasts from week 3 to week 8, the major milestone is organ formation. The embryo develops basic organ systems during this period.

In the fetal stage, which starts at week 9 and lasts until birth, the major milestone is the continued growth and development of the body, brain, and organs.