Generally, the probability of giving birth to a baby is relatively high around 39 weeks. Basically concentrated in 38 ~ 40 weeks.
40 weeks is a complete pregnancy process for pregnant women, which is a little more than 9 months if converted into months. In medicine, the first day of the last menstruation is generally used to calculate the expected date of delivery. The normal pregnancy time is about 265 days, and ovulation is in the middle of menstruation, so 40 weeks of pregnancy is 2 weeks longer than the actual pregnancy time calculated from the beginning of egg fertilization. If a woman's menstruation takes 28 days as a menstrual cycle, then 280 days of pregnancy is equivalent to ten months of pregnancy, so there is a saying that she is pregnant in October. Pregnant women give birth within 38 ~ 42 weeks, all of whom are full-term babies. The baby's birth is not necessarily born at 40 weeks, and it is normal around 40 weeks.
Babies born between 37 and 42 weeks are common. Babies born in this period have stronger resistance than premature babies. Babies born between 37 weeks and 42 weeks are fully developed.
Babies born before this are premature, and their physical resistance is poor and their survival rate is low. We often hear that premature babies are born for one reason or another, depending on the size and completeness of fetal development. Six months of fetal development has basically taken shape. The hair of the fetus can be clearly seen by color Doppler ultrasound, and the baby's bones and internal strength have started to work normally. But the body's immunity is poor and the survival rate is low.
What are the signs before delivery?
1. Pregnant women feel abdominal relaxation.
One to two weeks before delivery, because the child's head enters the pelvis first, the position of the bottom of the uterus will drop, so pregnant women will feel more comfortable in the upper abdomen, breathe easier and eat more. The fall of the child's head will oppress the pelvic cavity, bladder and other organs, so pregnant women will have abdominal pain and swelling, frequent urination, backache and other symptoms.
2. False array contraction
One to two weeks before the birth of a child, a woman's uterus will contract irregularly, but compared with the contractions during labor, there are the following points that can be distinguished: the contraction time is short, the interval is long and irregular, and the intensity will not increase. Women will feel abdominal pain, but this symptom only appears below the abdomen, the cervix will not expand due to contraction, and a small amount of sedatives can inhibit it.
See red
One or two days before delivery, pregnant women's vagina will flow out with viscous liquid mixed with blood, commonly known as "seeing red". When the uterus and cervix dilate, the fetal membrane on the uterine wall will fall off, and then this will happen. Capillary will also bleed due to rupture, and form bloody mucus together with the viscous liquid in the cervix, which is a reliable sign before delivery. If the amount of vaginal bleeding is large, even exceeding the amount of menstruation, it cannot be considered as a precursor to childbirth. Consider whether you have hemorrhagic diseases in the third trimester of pregnancy, such as placental abruption.
4. Recurrent abdominal pain
The duration of pain is about 30 seconds, and the interval is 10 minute. The time of pain will be gradually prolonged, and the frequency of pain attack will become faster, which is a relatively regular pain.
break the ice
Breaking water means that amniotic fluid flows out of the vagina. Due to the severe contraction of the uterus, the pressure in the uterine cavity is increasing, the uterine orifice will become larger, the child's head will fall, resulting in tearing of the fetal membrane and amniotic fluid flowing out of the vagina. At this time, it is close to the time when the child was born.
6. There is a feeling of oppression in the lower abdomen
After the child's position drops, the part that will be exposed first when the child is born drops to the pelvic entrance, so pregnant women will feel pain below the abdomen and the bladder will be squeezed. Pregnant women will feel sore waist and legs, it is inconvenient to walk, and they often want to go to the toilet.