Normal Pregnancy


ImageAs we know, fertilization of the egg takes place in the fallopian tube. After about seven days, the fertilized egg enters the uterine cavity and embeds itself in the inner wall of the uterus. The fertilized egg gradually increases in size and occupies most of the central space of the developing pregnancy. Simultaneously another very specialized group of cells, called the inner cell mass, begins to grow rapidly. This inner cell mass that ultimately develops into the baby, protrudes into the potential amniotic cavity. This cavity contains amniotic fluid. When the fertilized egg embeds in the uterus, it is not yet a foetus. It is just a group of cells.

Pregnancy is normally divided into three phases called trimesters, each of which is three months long. Detailed below is the normal development of the baby in each of the three trimesters.

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