What’s wrong with less urine in the third trimester of pregnancy?
The third trimester is a time when pregnant women's bodies undergo significant changes, and many expectant mothers may notice a decrease in urine output. This can be caused by a variety of factors, including physiological changes, not drinking enough water, or an underlying health problem. This article will analyze in detail the causes of oliguria in late pregnancy, possible health risks, and countermeasures.
1. Common causes of oliguria in late pregnancy

Decreased urine output in late pregnancy may be related to the following factors:
| Reason | Description |
|---|---|
| uterine compression | An enlarged uterus may put pressure on the bladder and ureters, causing difficulty urinating or decreased urine output. |
| Not enough water | Pregnant women drink less water due to inability to move around or worry about frequent urination, resulting in reduced urine output. |
| Edema | Edema is common in late pregnancy, and water retention in the body may lead to reduced urine output. |
| gestational hypertension | Pregnancy-induced hypertension may cause abnormal kidney function, which may affect urine output. |
| urinary tract infection | A urinary tract infection may cause painful urination or decreased urine output. |
2. Health risks of oliguria in late pregnancy
Decreased urine output may be a sign of certain health problems that require attention:
| risk | Description |
|---|---|
| dehydration | Reduced urine output may be a sign of dehydration, and severe dehydration can affect fetal development. |
| Abnormal kidney function | A continued decrease in urine output may indicate a kidney function problem and requires prompt medical attention. |
| pregnancy-induced hypertension syndrome | Oligouria accompanied by high blood pressure and proteinuria may be manifestations of pregnancy-induced hypertension syndrome. |
3. How to deal with oliguria in late pregnancy
If urine output decreases in the third trimester of pregnancy, you can take the following measures:
| measures | Description |
|---|---|
| Increase water intake | Make sure you drink enough water every day. It is recommended to drink 1.5-2 liters of water every day. |
| Avoid standing for long periods of time | Standing for a long time may aggravate edema, and proper rest can improve blood circulation. |
| Monitor blood pressure | Measure your blood pressure regularly and seek medical advice promptly if any abnormalities are found. |
| Medical examination | If urine output continues to decrease or is accompanied by other symptoms, you should seek medical examination in time. |
4. Precautions for oliguria in late pregnancy
Although oliguria is common in late pregnancy, you still need to pay attention to the following points:
1.Don't ignore symptoms: If the decrease in urine output is accompanied by symptoms such as abdominal pain, dizziness, or worsening edema, seek medical attention immediately.
2.Eat properly: Reduce the intake of high-salt foods to avoid aggravating edema.
3.Regular prenatal check-ups: Prenatal check-ups should be carried out on time during the third trimester of pregnancy to detect potential problems in time.
5. Summary
Oligouria in late pregnancy may be caused by physiological changes or health problems. Expectant mothers should pay attention to their physical condition, drink enough water, eat properly, and seek medical examination in time. Through scientific countermeasures, health risks can be effectively reduced and the safety of mothers and infants ensured.
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