Physiology of Conception

Question 1

Heart starts beating on Day _____

Answer 1

Day 21 after fertilization

Question 2

Piscacek sign

Answer 2

Assymetrical enlargement of the uterus in early pregnancy

Question 3

Type of implantation seen in humans

Answer 3

Interstitial implantation

Question 4

Layer limiting penetration of blastocyst into uterus

Answer 4

Nitabuch’s layer

Question 5

Order of formation of three germ layers.

Answer 5

First to develop is endoderm —> mesoderm—-> ectoderm

(Inside out)

Question 6

Double ring sign on USG

Answer 6

First sign on USG

Blastocyst causing indentation of the uterus
Surrounded by two layers
- Outer layer: Decidua parietalis
- Inner layer: Decidua capsularis