Introduction to Human Development definitions Flashcards

The moment an oocyte is fertilized by a sperm cell, marking the start of development.

A term for the developing offspring, applicable to both embryos and fetuses.

The time from the mother's last menstrual period to birth, typically 40 weeks.

The first two weeks post-conception, where the conceptus is called a blastocyst.

Weeks 3-8 post-conception, characterized by rapid development and organ formation.

Weeks 9-38 post-conception, where the conceptus is referred to as a fetus.

A structure formed in the early development stage, consisting of a cell mass.

A three-layered structure formed during the embryonic period.

The process where a sperm cell merges with an oocyte, initiating development.

A series of rapid cell divisions following fertilization, leading to blastocyst formation.

The process of the blastocyst embedding into the uterine wall.

The formation of the trilaminar disc from the blastocyst.

The formation and development of organs during the embryonic period.

The development and growth of the placenta, beginning early in embryonic development.

Membranes that develop outside the embryo, starting in the preembryonic stage.