In plain words
Matrix metalloproteinases are enzymes that break down and other supports in tissue. The body uses them to reshape tissue during growth and healing. Near the end of pregnancy, they are part of the changes that soften the cervix and weaken the membranes around the baby. They are also active in healing tissue after birth. Their activity is kept in balance by natural inhibitors. Mothers do not need to track these enzymes. You may see them mentioned in articles about labor timing or tissue repair, and that is the context.
The deeper version
Matrix metalloproteinases are zinc- and calcium-dependent endopeptidases that degrade extracellular matrix components, including collagens, elastin, and proteoglycans, and they are regulated by tissue inhibitors of metalloproteinases (TIMPs). In late pregnancy, MMP activity rises in the cervix and fetal membranes, contributing to cervical remodeling and membrane weakening before rupture. Visse and Nagase (Circulation Research, 2003) reviewed their structure, activation, and inhibition. Their roles in and preterm rupture of membranes remain under study. Bedside MMP-based tests are used only in narrow clinical situations, and whether MMP measurement can predict labor timing is an open question.
Where it comes up
- When your water breaksGetting Ready for Birth
- Signs labor is startingGetting Ready for Birth
- Healing a tear or stitchesPostpartum: Your Body
- Eating for tissue healingNourishment and Traditions
What mothers here say about matrix metalloproteinase
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Sources
- Visse R and Nagase H. — Matrix metalloproteinases and tissue inhibitors of metalloproteinases: structure, function, and biochemistry, Circulation Research (2003)