What impact does having a cold and cough during early pregnancy have on the fetus?

Coughing and colds during early pregnancy can adversely affect fetal development. Specifically, colds in early pregnancy are often caused by inflammation, which may impair fetal brain development and increase the risks of congenital malformations and compromised immune function in the child. Moreover, pregnant women with a history of habitual miscarriage who develop coughs or colds may experience threatened miscarriage. Therefore, women experiencing colds or coughs during early pregnancy should seek appropriate, medically supervised treatment.

How do colds and coughs during early pregnancy affect the fetus?

1. Threatened Miscarriage

If left untreated, severe or persistent coughing during pregnancy can significantly harm fetal development—though the extent of impact depends on the duration and severity of the cough, requiring individualized assessment. During the first trimester (within the first 12 weeks), the embryo is not yet fully stabilized. Excessive or forceful coughing may stimulate uterine contractions, thereby increasing the risk of threatened miscarriage or preterm labor. Pregnant women must therefore take such symptoms seriously.

2. Impaired Brain Development

Coughing during early pregnancy may also interfere with fetal brain development. In some cases, coughs stem from viral infections; if not promptly resolved, residual viruses may cross the placenta via the umbilical cord and disrupt normal embryonic development.

Many women resort to medications for severe coughs; however, using drugs without strict adherence to medical guidance—or selecting contraindicated medications—may impair fetal development, potentially affecting neural development and resulting in cognitive deficits. Affected children may exhibit developmental delays compared with their peers after birth. Thus, self-medication during pregnancy should be strictly avoided.

3. Increased Risk of Congenital Malformations

The early stage of pregnancy represents the most rapid phase of fetal neural and limb development. Any maternal abnormality—including persistent coughing—during this critical window may adversely influence fetal growth. Frequent, forceful coughing may exert mechanical pressure on the uterus, restricting fetal movement and growth.

4. Reduced Fetal Immune Function

In fact, virtually all maternal behaviors and health conditions during pregnancy can shape the child’s long-term health outcomes. Maternal pathogenic infections during gestation may lead to fetal immune deficiency, predisposing the newborn to various illnesses. Furthermore, certain pathogens may invade the developing fetal organs—including the heart—causing structural abnormalities such as congenital heart disease.

The above outlines the potential effects of colds and coughs during early pregnancy on fetal development.