Fetus is unborn offspring of living beings which is developed from an embryo. In human beings it is actually usually two months or eight months after conception to birth.
The fetal period begins 8 weeks after fertilization of an egg by a sperm and ends at the time of birth.
Pregnancy is the period when an offspring develops inside the human body. It is also called Gestation. The primary indication of pregnancy is typically a missed menstrual period. A lady's bosoms swell and may get delicate as the mammary organs plan for possible breastfeeding. Areolas start to grow and the veins over the outside of the bosoms become increasingly perceptible. Queasiness and spewing are normal manifestations and are generally more terrible in the first part of the day and during the primary trimester of pregnancy. They are normally brought about by hormonal changes, specifically, expanded degrees of progesterone.