The pregnancy rate is the percentage of people who get pregnant. It is the percentage of all attempts that lead to pregnancy. It is usually one try during a woman’s menstrual cycle, where artificial insemination or any artificial equivalent is used, which may be simple artificial insemination (AI) or AI with additional in vitro fertilization. The pregnancy rate is often used to refer to the pregnancy expected within one year among sexually active couples not using contraception. The pregnancy rate is also known as the ‘Harm Rate’ or ‘Conception Rate’.
The pregnancy rate has been used as an indicator of how effective a contraceptive method or procedure is in preventing unintended pregnancies and resulting abortions. It is most commonly used with regard to experiments on contraception, but can also be used in studies on sexually transmitted infections (STIs), or to compare STI rates among populations. The pregnancy rate includes abortions and miscarriages through induced terminations.
During this period, multiple pregnancies will be counted as one event. Pregnancy rates also include stillbirths that occur at greater than 20 weeks gestation to ensure comparability with other countries. The pregnancy rate includes both intended and unintended pregnancies. Thus, if a method of contraception is very effective in preventing pregnancy, but leads to many unintended pregnancies and much higher abortion rates, its overall effect might still be undesirable. In order to compare various methods fairly, the pregnancy rate has been compared specifically.