Birth Defects During Pregnancy: Causes, Risks, and What You Can Do

When we talk about birth defects during pregnancy, structural or functional abnormalities present at birth that affect how the body works or looks. Also known as congenital anomalies, these conditions can range from minor to life-altering and often stem from what happens in the first trimester when organs are forming. The truth is, most birth defects don’t have a single cause—they’re usually a mix of genetics, environment, and lifestyle. And one of the biggest, most overlooked factors? prenatal medication safety, how drugs taken by the mother during pregnancy can affect the developing fetus. It’s not just about avoiding alcohol or cigarettes. Even common over-the-counter pills, herbal supplements, or prescriptions you think are harmless can cross the placenta and interfere with fetal development.

Doctors often don’t warn you about this because they assume you’ll ask. But if you’re pregnant or planning to be, you need to know that teratogens, substances that can cause birth defects when exposure happens during critical windows of development. aren’t just the scary ones like thalidomide. Some antihistamines, antibiotics, seizure meds, and even acne treatments have been linked to problems like heart malformations, cleft palate, or neural tube defects. The timing matters just as much as the drug—what’s safe in week 10 might be risky in week 6. And here’s the kicker: many women don’t even know they’re pregnant until after that window closes. That’s why planning ahead and talking to your pharmacist or OB before you conceive is one of the smartest moves you can make.

It’s not all about drugs, though. fetal development, the complex process by which a single cell grows into a fully formed baby with organs, limbs, and systems. is also affected by nutrition, chronic illness, infections, and even stress levels. Folic acid reduces neural tube defects. Uncontrolled diabetes raises the risk of heart and spine problems. Rubella, Zika, and even the flu can cause harm if caught early in pregnancy. The good news? Many of these risks are preventable. You don’t need to live in fear. You need to be informed. And that’s exactly what the articles below deliver.

Below, you’ll find real, practical advice from trusted sources on how to navigate medication use while pregnant or breastfeeding, what to avoid, what’s safer than you think, and how to spot warning signs early. No fluff. No fearmongering. Just clear, evidence-based guidance to help you make smarter choices for your baby’s health—from the moment you start trying to conceive through the first weeks after birth.

Pregnancy and Medications: What You Need to Know About Teratogenic Risks and Birth Defects
Mark Jones 20 November 2025 15 Comments

Pregnancy and Medications: What You Need to Know About Teratogenic Risks and Birth Defects

Learn the real risks of medications during pregnancy, which drugs can cause birth defects, and how to make safe choices. Get clear facts on acetaminophen, warfarin, cannabis, and more - backed by current medical guidelines.