What makes your water break naturally?

The cause of spontaneous rupture of membranes is unknown. There are various theories as to what makes the water break, including hormonal changes and the mechanical pressure of the growing baby.

1. Hormonal changes:

As pregnancy progresses, the levels of the hormone relaxin increase. This hormone relaxes the muscles and ligaments of the uterus, cervix, and vagina, allowing them to stretch and prepare for the birth of the baby. Increased relaxin levels can weaken the membranes and make them more likely to rupture.

Other hormonal changes, including an increase in estrogen and oxytocin, may also contribute to the rupture of the membranes.

2. Mechanical pressure:

As the baby grows, the amount of amniotic fluid increases, putting pressure on the uterine wall. This pressure can cause the membranes to stretch and thin, making them more susceptible to rupture.

The force of the baby's head or limbs against the membranes can also contribute to their rupture.

3. Other factors:

Some other factors that may contribute to the rupture of membranes include:

Infections: Certain infections, such as chorioamnionitis, can cause inflammation of the membranes and make them more likely to rupture.

Multiple pregnancies: The increased pressure on the uterine wall from carrying multiple babies can increase the risk of membrane rupture.

Abnormalities of the uterus: Certain abnormalities of the uterus, such as a septate uterus or bicornuate uterus, can increase the risk of membrane rupture.

When does the water break?

For most women, the water breaks at the beginning of labor. However, for some women, it can break before labor starts or even during pregnancy.

If your water breaks before labor starts, it is important to contact your doctor or midwife. They will advise you on what to do next.