Enlarged Placenta: Understanding Placentomegaly in Pregnancy

Adult human female anatomy diagram chartAt home insemination

If your healthcare provider informs you that your placenta is larger than expected, you may be experiencing a condition known as placentomegaly. This term refers to a placenta that has grown disproportionately in size, either being thicker than normal or weighing more than anticipated—or both.

The placenta, a pancake-shaped organ in the uterus, acts as the vital lifeline for your developing baby by supplying nutrition, oxygen, and removing waste. Typically, it comprises about one-sixth of the baby’s weight and its thickness correlates with gestational age. For instance, a fetus at 20 weeks gestation is supported by a placenta roughly 20 millimeters thick; at 24 weeks, it should measure about 24 millimeters thick, and so forth. However, the dimensions of placentas can differ significantly among expectant mothers. Generally, a well-nourished woman may produce a larger, more efficient placenta compared to one who is undernourished.

While an enlarged placenta is not exceedingly common, it is not unheard of either. Several factors can contribute to this condition, including smoking, specific uterine infections, and certain maternal health issues such as anemia, diabetes, or hypertension. Fortunately, many instances of placentomegaly do not pose significant risks.

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In summary, placentomegaly, or an enlarged placenta, can occur during pregnancy due to various factors. It’s essential to discuss any concerns with your healthcare provider to ensure a healthy pregnancy.