Health exams for: #AGEGROUP#
The following exams, tests, and procedures are recommended for #AGEGROUPLOWER#.#FEMALETEXT#
Select a link from the list below to learn how and why each test is performed, as well how to prepare for it.
The following exams, tests, and procedures are recommended for #AGEGROUPLOWER#.#FEMALETEXT#
Select a link from the list below to learn how and why each test is performed, as well how to prepare for it.
Millions of sperm are released during a single ejaculation. Their tails propel on their journey to encounter the single egg cell. Of the millions of sperm, only a few will survive to reach the egg and just one will penetrate the egg cell’s wall to combine it’s genetic material with that of the egg in the process called fertilization. If during the first week of cell division, the fertilized egg cell, or zygote, divides into 2 zygotes, identical twins will form. Each developing embryo contains the same genetic material as the other.
Review Date: 8/12/2025
Reviewed By: LaQuita Martinez, MD, Department of Obstetrics and Gynecology, Emory Johns Creek Hospital, Alpharetta, GA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.