Does a low-lying placenta cause preterm birth?

Written by Zhao Li Li
Obstetrics
Updated on May 05, 2025
00:00
00:00

In cases of placenta previa, there is also a certain risk of preterm birth. Generally, in the late stages of pregnancy, a persistent low-lying placenta may have some impact on the development of the placenta and embryo. Excessive physical activity or normal daily activities may cause abnormal vaginal bleeding. Long-term blood clots pressing on the cervix can also promote cervical dilation and lead to preterm birth. Therefore, it is generally necessary to rest in bed and avoid excessive exercise after placenta previa occurs, in order to reduce the risk of bleeding.

Other Voices

doctor image
home-news-image
Written by Liu Wen Li
Obstetrics
40sec home-news-image

Are the twins premature?

The likelihood of premature birth is higher in twins than in singletons, but this does not mean that all twins will be born prematurely. In the case of twins, there are two children in the uterus. Generally, the combined weight of two children is more than that of one. Additionally, there might be more amniotic fluid and a larger placental area. Therefore, the contents of the uterus occupy more volume, and when the uterus is stretched to a certain extent, its sensitivity increases. As a result, some may experience contractions and give birth prematurely before reaching 37 weeks of pregnancy.

doctor image
home-news-image
Written by Du Rui Xia
Obstetrics
49sec home-news-image

How many weeks early can a premature baby survive?

Preterm birth refers to births that occur after 28 weeks of pregnancy but before 37 weeks. Preterm infants have lower resistance compared to full-term infants and generally require special care to survive. The survival rate varies with the gestational age: at 32 to 33 weeks, the survival rate can reach 95%; at 28 to 31 weeks, it is between 90% and 95%; at 26 weeks, it is around 80%; and at 27 weeks, it is about 90%. After 34 weeks of pregnancy, the survival rate of the baby is very high, almost the same as that of a full-term baby.

doctor image
home-news-image
Written by Zhang Lu
Obstetrics
1min 5sec home-news-image

What are the symptoms of premature birth?

Premature birth refers to delivery occurring between 28 and 36+6 weeks of pregnancy. The symptoms of premature birth primarily include the following aspects: First, regular uterine contractions occur. These contractions can lead to the descent of the fetal head and exert pressure on the cervix, which is necessary for the delivery of the fetus. It generally manifests as pain every three to five minutes, with each episode of pain lasting more than one minute, and both the frequency and intensity of the pain gradually increasing. Second, the appearance of "bloody show" occurs. As the fetus descends, it can cause the rupture of capillaries at the edge of the membranes, leading to bloody show. Third, there is a noticeable feeling of heaviness or pressure. Gynecological examinations can reveal dilation of the cervix and shortening of the cervical canal. When these symptoms appear, an assessment for premature birth should be conducted, and preparations for premature delivery should be made.

doctor image
home-news-image
Written by Zhao Li Li
Obstetrics
46sec home-news-image

How many months premature can survive?

Premature infants are those born between 28 and 37 weeks of gestation. Due to the incomplete development of various organ functions, premature infants are prone to a range of complications after birth, which can be severe and may even lead to death. Generally, the survival rate of premature infants is higher if they reach at least seven months, or 28 weeks, of gestation. If premature birth is inevitable, it is recommended to seek medical care at a qualified institution with specialized neonatal resuscitation wards to enhance the chances of the infant's survival. Generally, the chances of survival significantly increase when care is received at such medical facilities.

doctor image
home-news-image
Written by Yue Hua
Obstetrics and Gynecology
44sec home-news-image

Premature birth is how many months?

Preterm birth refers to a newborn born between 28 and less than 38 weeks of pregnancy. Moreover, at this time, the heart size is generally more than 1000 grams. There are many reasons for this occurrence, most of which are related to intrauterine infection in pregnant women, such as patients with premature rupture of membranes or chorioamnionitis are prone to preterm birth. Additionally, if there has been a previous pregnancy, abortion, with a short interval between them, or if an ultrasound detects that the cervical length is less than 25 millimeters, there is also an increased likelihood of preterm birth.