Post-term pregnancy increases risk of fetal distress
Encyclopedic
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It was a day of spring warmth and blossoms. For love, I made a bold move: I gave up my well-paying job in Beijing and came alone to Guangzhou to join Liu, my boyfriend of four years. Arriving at Baiyun Airport, dusty and weary, I instantly recognized my longed-for lover in the crowd. We embraced tightly, as if holding the promise of a beautiful future.
Our newlywed home was nestled in a picturesque garden community. Though it was a high-priced mortgage property, it didn't dampen our excitement one bit. We even used it as motivation to push ourselves harder. During that period, Liu and I worked relentlessly. At my new workplace, I focused on building relationships to quickly grasp the business, and working late into the night became routine.Half a year later, I finally earned my boss's recognition and was promoted from a regular employee to a mid-level manager. However, the price was steep: due to overwork, I experienced sudden lower abdominal pain while walking home one day, just over two months into my pregnancy. Four hours later, I was forced to undergo an abortion. Seeing the doctor's regretful gaze, I knew clearly that this was caused by consecutive nights of planning proposals and severe physical exhaustion.When Liu gently supported my pale face out of the operating room, I surprisingly managed to say with strength and humor, "As long as the green mountains remain, we needn't fear the lack of firewood. Don't worry, I'll give you another little bundle of joy soon enough." Liu, who had been tense, chuckled at my words, but quickly grew serious again: "Rulian, let's wait until you've fully recovered. You simply can't keep neglecting your health like this."Hearing this, my smile vanished. Liu was absolutely right. My carelessness and negligence had made me forget I was pregnant. I kept running around at work like always, striving for perfection. I could say I was a competent employee, but I was a negligent mother—it was my fault that the child died before even coming into this world.For a long time afterward, whenever I recalled this heartbreaking loss, I was still filled with regret. It became an indelible shadow on my heart. My second pregnancy came a year later, in the autumn. By then, Liu had become a department manager at the company, and our financial situation had steadily improved. With some savings accumulated, the idea of having another child naturally came back into focus.That day, I suddenly found myself craving sour foods. When the hospital confirmed I was pregnant again, I could scarcely believe it—as if I were dreaming (for I had feared the miscarriage might affect future pregnancies, even causing lifelong infertility).
Having learned from my past mistake, I resolved never to neglect my responsibilities this time. I was determined to give birth to a bright, healthy baby.From then on, I became extremely cautious. I bought numerous pregnancy guidebooks and meticulously planned a high-nutrient, vitamin-rich diet for myself, steering clear of anything that might harm the fetus. Due to my job, which required long hours in front of a computer and a fast-paced, demanding schedule, I reluctantly left my beloved workplace at three months pregnant.Truthfully, it hadn't been easy for a woman to reach this point in life. Yet for my child, I willingly gave up everything—I couldn't risk losing my dearest treasure again. From then on, I embraced a wholly domestic existence. Each day, I felt the subtle shifts within my belly, caressing my growing bump while talking, singing, and telling stories to my baby.Day after day, I wore loose maternity dresses without makeup, reading books and newspapers in bed. Surprisingly, I quickly adapted to this tranquil life and genuinely cherished these peaceful days—because it was all for my child. Yet as the weeks passed and my belly grew larger, making movement increasingly difficult, I became even less inclined to move. I often spent entire days lying on the sofa or bed.Fortunately, Liu had hired a nanny to manage our daily needs, so I had little to worry about. Reading books and newspapers each day felt quite carefree.
Around eight months pregnant, one morning I went to the pharmacy to buy cold medicine for Liu. Perhaps because I hadn't been active in so long, I returned home breathless and exhausted. My abdomen felt hard and slightly painful. Fear gripped me: "Could something be wrong again?" Though things soon returned to normal, lying in bed, I couldn't help worrying: Could this be another sign of miscarriage? I needed to find a way to protect the pregnancy. Suddenly, I remembered seeing pregnancy-preserving medicine at the pharmacy earlier. The thought brought me relief, so that afternoon, I took a taxi back to the pharmacy and bought several boxes of the medicine.Thinking that the purpose of these pills was to protect the pregnancy, I figured taking more couldn't hurt. So, after only a cursory glance at the instructions, I started taking them. This continued until the day before my due date, when I finally finished the boxes. As the last pill slid down my throat, I felt a surge of excitement: "It's almost done! Tomorrow is the due date, and I'll be a new mom!"To my surprise, the due date arrived, yet there was no sign of movement from the baby inside. Confused, I muttered to myself, "What's going on? Why is the baby lingering in there, refusing to come out?" Hearing this, my husband smiled and reassured me, "Silly, don't worry. Not every baby arrives right on schedule, right?Ours is just an exception." He had a point. Besides, my periods were never regular—maybe the pregnancy timeline was off. So I patiently waited another three days. Still no sign of labor, though the baby's movements felt perfectly normal. My nerves started to fray. I asked Liu again, and he said, "Just wait a few more days.as the saying goes, when the time is right, it will happen naturally. Don't you understand that? And so, I endured another agonizing two weeks of waiting that felt like an eternity. But aside from the occasional fetal movement, the little one still showed no signs of coming out.
Finally, I couldn't bear the torment any longer and decided I absolutely had to go to the hospital for a proper checkup the next day.The next morning, we arrived at the hospital early. When I voiced my anxiety, the obstetrician kindly reassured me not to worry. She conducted a thorough examination, including an ultrasound and fetal monitoring. Then, with a serious expression, she informed us the baby's heart rate was concerning—showing signs of intrauterine distress. She recommended an immediate cesarean section, warning that delay could jeopardize the fetus's safety.Four hours later, when a clear, newborn cry filled the operating room, my anxious heart finally settled. Later, the doctor explained that my situation was classified as post-term pregnancy, and continuing to wait could have led to adverse outcomes.Unexpectedly, the "well-intentioned" efforts to preserve the pregnancy—believed to benefit the baby—turned out to be a misunderstanding that nearly cost the baby its life. After this ordeal, I learned a lesson: never act on assumptions again.
Doctor's Commentary: For pregnant women with regular menstrual cycles, delivery occurring more than two weeks past the due date is classified as post-term pregnancy. Approximately 40% of post-term pregnancies may experience a reduction in the placental villi vascular bed, leading to insufficient blood and oxygen supply. This decline in placental function makes the fetus vulnerable to unexpected complications during labor, as it may struggle to adapt to the additional oxygen deprivation caused by uterine contractions.
Post-term fetuses exhibit three growth patterns. First: With normal placental function, the fetus continues growing—gaining about 25% in weight to become macrosomic. Its skull hardens and becomes less malleable, making passage through the birth canal difficult and increasing the risk of obstructed labor.Second: Due to inadequate placental blood supply, fetal growth ceases. Vernix disappears, subcutaneous fat diminishes, skin becomes dry and loose, and numerous folds appear locally, resembling a "little old person." Severe fetal hypoxia may cause anal sphincter relaxation with meconium passage, staining the amniotic fluid and fetal skin yellow.Type 3: The fetus has exhibited poor development since late pregnancy. Failure to deliver by the due date leads to post-term pregnancy, where declining placental function increases fetal risk, potentially resulting in intrauterine death.Additionally, after 42 weeks of gestation, approximately 30% of mothers may develop oligohydramnios (low amniotic fluid volume). This condition increases the risk of umbilical cord compression, potentially leading to fetal distress and uterine contraction dyssynchrony during labor. Prolonged labor may result, thereby increasing the likelihood of dystocia.
The occurrence of post-term pregnancy may be associated with the following factors:
① Hormonal imbalance: Excessive secretion of progesterone, which inhibits uterine contractions, coupled with reduced secretion of estrogen and prostaglandins that promote labor onset, results in uterine inertia and delayed delivery.
② When the fetal head is too large or the pelvis is too small, the fetal head cannot engage in the pelvis and stimulate the cervical os and lower uterine segment to induce labor.
③ Genetic predisposition: Recurrent post-term pregnancies in certain families or individuals suggest genetic factors play a role.
④ Congenital anomalies (e.g., anencephaly): Impaired development of the fetal pituitary-adrenal axis reduces estrogen production by the placenta, contributing to post-term pregnancy.
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