Chapter 21, Problem 2AWK

Summary Introduction

To review:

The way by which the conjoined twins are formed during the early stages of development.

Introduction:

Twins can be defined as the multiple births that are estimated to occurs once in 90 births. There are rare cases of sextuplets or septuplets (six or seven newborns at once), which occur as result of fertility drugs usage. The occurrence of natural triplets is also rare, that is, 1 in 8,000 births.