What factors increase the risk of fetal abnormalities?
1. Radiation Exposure
Some expectant parents anxiously inquire about prior X-ray exposure before pregnancy, or even during known pregnancy due to routine workplace physicals. The harmful effects of X-rays on the human body are well-documented. Not only can they damage fetal cells, but they also cause cell damage in adults.
X-rays can cause fetal malformations, miscarriage, stillbirth, and even increase the risk of childhood leukemia a decade later. Exposure as early as three months before conception can still affect the fetus. Therefore, avoiding X-rays after marriage is advisable.
Computers and televisions are indispensable modern tools in daily life. How significant is the radiation from computer or TV screens for the fetus?Based on currently available research, no authoritative conclusions have been reached by medical experts, and large-scale population studies remain insufficient.
Theoretically, the radiation levels from screens are safe for humans. However, are they safe for sperm, eggs, fertilized eggs, embryos, and fetuses? For optimal prenatal health, it is advisable to prepare in advance by reducing net screen time at least three months before conception.Limit daily screen time to 2–4 hours. Maintain a distance of at least 70 cm from the screen. 2. Medications International studies indicate that 70–80% of pregnant women take medications during pregnancy. Approximately 2–3% of birth defects in newborns may be medication-related, while over half of unexplained birth defects could stem from interactions between drugs and underlying conditions.Most harmful drug exposures occur unknowingly during early pregnancy, particularly when treating pregnancy-related nausea as illness. Unintentional medication use often persists until pregnancy is confirmed, causing anxiety and frequently leading to unsatisfactory medical advice.
This is because nothing is 100% certain, and definitive answers are rare. The solution is to prioritize pregnancy testing after marriage, always placing it first, and exercising extreme caution with medication. Conversely, some expectant parents overcompensate, refusing medication under any circumstances.
One case involved a pregnant woman who presented with severe pyelonephritis after enduring a week at home with a fever of 39°C and a renal abscess. While medication's impact on the fetus must be considered, the disease's potential harm to the baby warrants greater concern. This issue requires objective evaluation and weighing of risks versus benefits. Never self-medicate when ill; seek prompt medical attention.
3. Genetic Disorders
For conditions like hemophilia, female carriers should consider gender selection. Since hemophilia is inherited through the mother's gene, sons may develop the disease. If the father has hemophilia, daughters may become carriers. Therefore, when the father has hemophilia, it is advisable to have a son.If the mother carries the hemophilia gene, having a daughter is recommended. Other chromosomal abnormalities and genetic disorders are not listed here. 4. Viral Infections With the availability of hepatitis B immunoglobulin and vaccines, and no reported fetal malformations linked to hepatitis B virus, expectant parents need not panic about HBV infection. Instead, focus should be on STORCH infections.S stands for SYPHILIS; T for TOXOPLASMOSIS; O for OTHER; R for RUBELLA; C for CYTOMEGALICVIRUS;H stands for HERPES SIMPLEX. If a pregnant woman contracts these viruses, it can lead to miscarriage, stillbirth, birth defects, or premature birth. The risk of infection among women of childbearing age is not low.
During prenatal checkups, doctors may test for viral infections. A positive result often causes extreme panic for both partners.Since no effective treatment currently exists to prevent fetal infection, prevention becomes critically important.
5. Nutrition
Nutritional deficiencies are rare, but excessive nutrition is common. The rising incidence of macrosomia increases cesarean section rates and difficult deliveries. This higher rate of difficult deliveries contributes to an increase in birth defects and lays the groundwork for adult diseases.
Additionally, while malnourished pregnant women have decreased, broader nutritional deficiencies have risen. This includes unbalanced diets leading to inadequate micronutrients, macronutrients, or vitamins; impaired glucose tolerance or gestational diabetes; and persistently high rates of iron-deficiency anemia.
Therefore, while enhancing nutrition, attention must also be paid to balanced dietary combinations. More expensive or "high-end" foods are not necessarily better; avoid picky eating. Do not consume overly refined foods or excessive processed items.