There major phases of antenatal development are commonly divided into three trimesters. The first trimester involves embryogenesis. The second and third trimester involves fetal development. The pregnancy is considered viable from the third trimester onwards.

Prenatal, antenatal, or antepartum mean before birth.
antenatal as in an antenatal check up by doctor.

Antenatal screening tests are carried out by amniocentesis or by chronic villus sampling.

Is an antenatal care where by client are attendend to individually and each problems treated uniquely'

Antenatal testing includes any diagnostic procedures performed before the birth of a baby.