Pregnancy is based on dated, so the first day of your pregnancy is actually the first day of your last period. So this month starts out with your menstrual cycle.

When you conceive, this month your uterus will begin to undergo a rather remarkable change or metamorphoses that will increas in capacity by up to 1,000 times over the course of your pregnancy. Its weight will increase dramatically at the same time: while your prepregnant uterus weighs approximately 2.5 ounces (70 grams), by the time you’re ready to give birth, your uterus will be a much heftier 21⁄2 pounds (1,100 grams). We hope your knowledge is widening on what processes start to change woman’s body, from the first day of conceiving.