Type the number

Exercise and reference answers

Questions

1. Answer

   40

   Question

   Weeks in an average pregnancy

2. Answer

   3

   Question

   Trimesters a pregnancy is divided into

3. Answer

   13

   Question

   Weeks in one trimester, about

4. Answer

   72

   Question

   Hours an unfertilised oocyte cannot survive beyond

5. Answer

   9

   Question

   Week from which the embryo is called a fetus

6. Answer

   1

   Question

   Sperm that may fertilise one oocyte

Instructions

Type the number only.

Explanation