1. Conception takes place when ....... . from a male, fertilizes a female's egg.

2. Parents, who've never had children before, are often extremely excited and nervous before having their .......- born child.

3. A child who is born last in a family is called the ....... child.

4. ....... twins are two babies who are born at the same time (or very close to the same time) and have the same DNA.

5. On the other hand, ....... twins are two babies who share their mother's womb and are born at the same time (or close to the same time), but do not have the exact same DNA.

6. A ....... child is born after the first child but before the youngest child.

7. An ....... child doesn't have any brothers or sisters.

8. ....... are three babies that share their mother's womb and are born at the same time (or close to the same time).

9. First-....... parents are often inexperienced, but are usually eager to learn about parenting.

10. In North America, the youngest child is often called the ....... of the family.