Is 35 weeks considered premature?

Apr 19, 2023 Source: Cainiu Health

Dr. Lv Aiming

Introduction

Gestation at 35 weeks is generally considered preterm. Clinically, full-term pregnancy ranges from 37 to 42 weeks, during which the fetus has fully developed. If delivery occurs before this time frame, it is classified as preterm birth; therefore, a 35-week gestation is considered preterm. At 35 weeks of pregnancy, the woman is in the late stage of pregnancy and the fetus is nearly mature.

Pregnancy at 35 weeks is generally considered preterm, with the specific analysis as follows:

Clinically, full-term pregnancy ranges from 37 to 42 weeks, during which the fetus has fully developed. If delivery occurs before this period, it is classified as preterm birth; therefore, delivery at 35 weeks is considered preterm. At 35 weeks of gestation, the pregnancy is in the late stage, and fetal development is approaching maturity. However, if the abdomen suffers external trauma or intrauterine infection occurs, the uterus may be abnormally stimulated, leading to frequent uterine contractions, premature rupture of membranes, and detachment of the placenta from the uterine lining, resulting in preterm labor. Pregnant women may experience a sensation of heaviness or pressure in the lower abdomen, along with significant fluid discharge from the vagina. It is recommended to follow medical guidance for treatment using medications such as indomethacin tablets or atosiban acetate injection to prolong the gestational period. If cesarean section criteria are met, delivery can also be performed via cesarean surgery.

After delivery, it's important to maintain body warmth, increase nutritional intake, and avoid heavy physical labor. Additionally, since preterm infants have weaker physical conditions, their vital signs should be closely monitored, and any abnormalities should prompt immediate medical attention.

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At how many weeks is it best to perform a cesarean section for complete placenta previa?

Cesarean section refers to delivery via abdominal surgery. For complete placenta previa, cesarean delivery is recommended after 35 weeks of gestation. Complete placenta previa, also known as central placenta previa, occurs when the placenta completely covers the cervical os. After 28 weeks of pregnancy, the placental position may become lower, and bleeding may occur in late pregnancy. This condition is a contraindication for vaginal delivery.

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At 35 weeks, to what extent does frequent fetal movement indicate oxygen deprivation?

Under normal circumstances, the typical fetal movement frequency at 35 weeks is 3–5 movements per hour, or 30–40 movements per 12 hours. If fetal movements exceed 5 times per hour or 40 times per 12 hours, this is considered excessive fetal activity, which may indicate fetal hypoxia. Prolonged oxygen deprivation can slow the fetus's growth and development, and in severe cases, may even lead to developmental arrest.

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What could be the cause of a fetal heart rate above 170 beats per minute at 35 weeks of pregnancy?

In general, a fetal heart rate of 170 beats per minute at 35 weeks of pregnancy indicates fetal tachycardia, also known as an elevated fetal heart rate. This may be caused by factors such as fetal movement, maternal emotional fluctuations, fetal hypoxia, hyperthyroidism, or gestational hypertension. It is recommended to seek medical attention promptly, identify the underlying cause, and receive appropriate treatment under the guidance of a qualified healthcare provider.