<prompt> Bih is defined asThe complete expulsion or extraction from the mother of a fetus after 20 weeks gestationThe complete expulsion or extraction from the mother of a fetus after 28 weeks gestationThe complete expulsion or extraction from the mother of a fetus after 38 weeks gestationThe complete expulsion or extraction from the mother of a fetus after 40 weeks gestation  <response>: Bih: The complete expulsion or extraction from the mother of a fetus after 20 weeks gestation. In the absence of accurate dating criteria, fetuses weighing 500 g are usually not considered as bihs but rather are termed abouses for purposes of vital statisticsRef: Williams Obstetrics; 25th edition 