Horace was born 26 weeks after conception. he now is a healthy, happy 2-year-old. horace's ability to survive after being born so early was due in part to his reaching the
1. term of postnatal development
2. germinal period
3. neurogenesis point
4. age of viability

Age of viability

answer; i believe the correct answer to the above question is ( friction)

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.