What is Post-term Pregnancy ?

A post-term pregnancy refers to a pregnancy that continues beyond 42 weeks (294 days) of gestation. While most pregnancies last around 40 weeks, some can extend a bit longer. In many cases, both mother and baby remain healthy; however, going significantly past the due date can increase certain health risks. Knowing what to expect and how your healthcare provider monitors post-term pregnancies can help ensure the safest outcome for both you and your baby.

Common Causes

The exact reason why some pregnancies go beyond 42 weeks isn’t always clear. However, some contributing factors include:

Incorrect due date calculation, often due to irregular menstrual cycles or late ovulation
First-time pregnancy – Post-term pregnancies are more common among first-time mothers
Previous post-term pregnancy – A personal or family history may increase risk
Carrying a male fetus – Statistically linked to slightly longer pregnancies
Obesity or genetic factors – May also play a role in extended gestation

Sometimes, the cause is unknown and unrelated to the mother’s or baby’s health.

Symptoms

There may not be any unusual symptoms in a post-term pregnancy, but potential concerns include:

Decreased amniotic fluid, which can affect the baby’s environment
Aging placenta, reducing oxygen and nutrient supply
Larger baby (macrosomia), which can make labor more difficult
Reduced fetal movement
Dry or peeling skin in the newborn due to prolonged exposure to amniotic fluid

Because of these risks, your care team may increase monitoring after 40 weeks.

Diagnosis

A post-term pregnancy is diagnosed when the pregnancy exceeds 42 weeks based on Accurate dating using early ultrasound or last menstrual period and:

Your provider will weigh these results when planning the safest course of action.

Treatment Options

Once a pregnancy reaches or passes 41–42 weeks, your provider may recommend:

Induction of labor – Using medications or other methods to begin labor
Frequent monitoring – If labor is not induced right away, close observation of the baby’s health is essential
Cesarean delivery – May be needed if induction fails or complications arise

Decisions are based on the baby’s condition, cervical readiness, and maternal preferences.

Take control of your health

with Advanced Women's Care

Post-term pregnancy is not uncommon and can often be managed safely with close monitoring and timely care. If your pregnancy has passed your due date, stay in close contact with your provider and attend all recommended appointments. At Advanced Women’s Care, we are committed to supporting your birth plan while ensuring the best outcome for you and your baby.