Intrauterine Pregnancy (IUP)

Definition - What does Intrauterine Pregnancy (IUP) mean?

An intrauterine pregnancy occurs when a fertilized egg implants and starts to develop within the uterus. The uterus is the only viable place a pregnancy can develop and progress to full term.

Pregnancies that develop elsewhere within the female reproductive tract are known as ectopic pregnancies are not viable and are a medical emergency.


FertilitySmarts explains Intrauterine Pregnancy (IUP)

Once an egg is fertilized, it travels down the fallopian tubes propelled by little “fingers” known as fimbriae to the uterus where it eventually implants in the uterine lining. The uterus is designed to house a growing pregnancy. It has a sufficient blood supply and the capacity and flexibility to enlarge with the growing fetus.

In some situations, the fertilized egg becomes implanted in places other than the uterus and this is known as an extrauterine or ectopic pregnancy. The fallopian tube is the most common ectopic site and may cause abdominal pain with bleeding and can be life threatening.

The location of a pregnancy can be determined with an ultrasound scan. An intrauterine pregnancy can be confirmed by a visible yolk sac or an embryo with a heartbeat.

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