Human Anatomy

Anatomy of the testes
Sweating (perspiration)
Urinary tract
3 weeks pregnant: The beginning of human development

1 week pregnant: The last menstrual period

Pregnancy week by week: Week 1 of the 40 weeks of gestation begins with the last menstrual period. The menstrual cycle has two components: the ovarian cycle and the uterine cycle. Both of these components are coordinated by the hormonal changes taking place within the body. They...

2 weeks pregnant: Ovulation

If you are planning to fall pregnant, the best time to have intercourse is around the period of ovulation. Ovulation refers to the release of the egg from the ovary, and occurs at the end of week 2 of the menstrual cycle.