What Happens When You're Overdue?
It is completely normal for pregnancies to go past the 40-week mark—only about 5% of babies are born exactly on their estimated due date. In most cases, a late delivery simply means the baby needs a few extra days or the conception date was slightly off.
When you enter weeks 41 and 42, your doctor or midwife will increase the frequency of prenatal visits to monitor your baby's health.
Early Fetal Monitoring Tests
To make sure the baby is thriving inside the womb, your provider will schedule special checks:
Non-Stress Test (NST)
Monitors the baby's heart rate response to movements over 20-30 minutes using abdominal belts, ensuring fetal oxygen levels are optimal.
Biophysical Profile (BPP)
An ultrasound assessment measuring fetal breathing, movement, muscle tone, and the volume of amniotic fluid around the baby.
Medical Induction Options
If tests indicate it is time to deliver, or if you reach week 41 or 42, your doctor will discuss inducing labor. Key methods include:
- Membrane Sweep: The doctor gently separates the amniotic sac from the cervix during an exam to stimulate natural prostaglandins.
- Cervical Ripening: Using hormones (like prostaglandin gels) or mechanical balloon catheters to soften and dilate the cervix.
- Amniotomy: Artificially breaking the water to speed up contractions.
- Pitocin: Administering synthetic oxytocin through an IV to initiate regular uterine contractions.
5 Questions to Ask Your Doctor
- How are we monitoring the baby's well-being (non-stress tests, biophysical profiles)?
- Is my cervix favorable for induction? What is my Bishop Score?
- What method of induction do you recommend, and what are the risks?
- Can we do a membrane sweep first to see if labor starts naturally?
- What is the maximum timeline we can safely wait before scheduled induction?
Frequently Asked Questions
When is a pregnancy officially considered overdue?
A pregnancy is considered late-term between 41 weeks and 41 weeks and 6 days. It is officially considered post-term (overdue) when it reaches 42 weeks or more.
Why do some pregnancies go past the due date?
Due dates are estimates. Common reasons for going overdue include irregular periods before pregnancy, first-time pregnancy, carrying a boy, genetic factors, or simply an incorrectly calculated due date.
What are the risks of going overdue?
As pregnancy reaches week 41-42, the placenta can begin to age and deliver nutrients less efficiently. There is also a risk of reduced amniotic fluid (oligohydramnios), meconium aspiration, or macrosomia (large birth weight).