In mammals,gestation is defined physiologically as the time from _____ to birth.
A)fertilization
B)implantation
C)blastocyst formation
D)ovulation
E)the first missed menstruation

Question

Quizplus · Accepted Answer

Gestation is defined physiologically as the time from implantation to birth in mammals. This is because after fertilization, the zygote undergoes several cell divisions to form a blastocyst which then implants in the uterine wall. From this point on, the developing embryo receives nutrients and oxygen from the mother, and this is the start of gestation.

In Mammals,gestation Is Defined Physiologically as the Time from _____