但西方国家的却是在38周才入盆
http://abbottnutrition.co.za/pregnancy/week/38
Your Changing Body When You're 38 Weeks Pregnant
[size=12.8000001907349px]Sometime between the 38th and 40th weeks of pregnancy, your body reaches its desired pregnant state. - Your uterus stretches from the pubic area all the way to the rib cage.
- You experience engagement (also known as lightening). This means baby starts moving down into your pelvis area.
- Gotta go? As your baby’s head settles into your pelvis, you feel added pressure on your bladder. This might lead to even more frequent urination.
- Due to back pain, you might have a hard time finding a comfortable position to sleep, sit, or even stand for very long.
- You might try to take your mind off these discomforts by:
- Reading a book
- Spending time with a friend
- Visiting with family
- Practicing relaxation techniques learned in childbirth classes
- Is it really labour? You might experience some or all of these symptoms as labour begins:
- Cervical changes, including thinning (effacement), softening, and opening (dilation) of the cervix
- Water breaking (though the percentage of women whose water breaks “on its own” is small)
- Diarrhoea
- Nausea
- Regularly spaced uterine contractions that do not stop
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