Stages of Pregnancy/Development (Fertilization, Implantation, Gastrulation, Neurulation, Gestation, Parturition, Lactation)

Question 1

Fertilization (Where, What?)

Answer 1

Fertilization creates a Zygote in the Fallopian Tube.

Question 2

Cleavage (Two regions?)

Answer 2

Cellular Division where a 16 cell morula turns into a Blastocyst. Trophoblast and Inner Cell Mass.

Question 3

Implantation (Where, What?)

Answer 3

Occurs on the Endometrium where enzymes secreted by Trophoblast digest blood vessels and tissues. Blastocyst eventually embeds.

Question 4

Gastrulation (What?)

Answer 4

Process of forming three layers.

Question 5

Neurulation (What, When?)

Answer 5

Process of Skeleton (Notochord) and Nervous System (Neural Tube) forming during the third week of development.

Question 6

Gestation (What?)

Answer 6

Process of development in womb.

Question 7

Parturition (What, When?)

Answer 7

Hormonal changes trigger uterine contractions. Oxytocin levels rise.

Question 8

Lactation (What?)

Answer 8

Estrogen and Progesterone prepare breasts for milk. Prolactin stimulates glands. Prolactin is stimulated by suckling.