B.A. PSYCHOLOGY, SOCIOLOGY AND ENGLISH Lecture Notes - Lecture 4: Prenatal Development, Blastocyst, Trophoblast

• School: CHRIST (Deemed to be University)
• Department: Humanities
• Course: B.A. PSYCHOLOGY, SOCIOLOGY AND ENGLISH

Document Summary

Prenatal period is the time between conception and birth. Typical prenatal development begins with fertilization and ends with birth, lasting between 266 and 280 days (from 38 to 40 weeks). This period is generally divided into three stages: the germinal stage, the embryonic stage, and the fetal stage: the germinal stage. The period of prenatal development that takes place in the rst two weeks after conception. It is characterized by the creation of the zygote, continued cell division, and the attachment of the zygote to the uterine wall. Rapid cell division by the zygote continues throughout the germinal period. By approximately one week after conception, specialization of di erent tasks has already begun. Implantation, the attachment of the zygote to the uterine wall, takes place about 11 to 15 days after conception. the di erentiation of these cells their: the embryonic stage. The period of prenatal development that occurs two to eight weeks after conception.