Human Reproduction — BIOLOGY STD 12 Science — Question

1.

Gestation means carrying, to carry or to bear. Gestation is the carrying of an embryo or foetus inside the female’s womb in mammals and non-mammalian species.

Pregnancy, more accurately, is the process and series of changes that take place in a woman’s body and tissues as a result of the developing foetus.

2.

The gestational age is counted as the time since the first day of the last menstrual period. Conception occurs two weeks after the last menstrual period.

Pregnancy is divided into three trimesters, each three months long. First trimester starts from the last period to the 13th week. Second trimester starts from the 14th to 27th week. Third trimester starts from 28th to 40th week.

3.

During the gestational period, the fetal development occurs in three phases.

During pregnancy, the female gains weight and develops symptoms like nausea, vomiting, tiredness, increased frequency of urination and tenderness in the breast.