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Reproductive Hazards
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Women

Reproductive Hazards

Reproductive hazards are chemical, physical, or biological substances that can negatively impact reproductive health and the ability to have healthy children.

What are reproductive hazards?

Reproductive hazards are substances that affect the reproductive health of men or women. They also include substances that affect the ability of couples to have healthy children. These substances may be chemical, physical, or biological. Some common types include:

  • Alcohol
  • Chemicals such as pesticides
  • Smoking
  • Legal and illegal drugs
  • Metals such as lead and mercury
  • Radiation
  • Some viruses

You may be exposed to reproductive hazards through contact with your skin, breathing them in, or swallowing them. This can happen anywhere, but it is more common in the workplace or at home.

What are the health effects of reproductive hazards?

The possible health effects of reproductive hazards include infertility, miscarriage, birth defects, and developmental disabilities in children. What type of health effects they cause and how serious they are depends on many factors, including:

  • What the substance is
  • How much of it you are exposed to
  • How it enters your body
  • How long or how often you are exposed
  • How you react to the substance

How can reproductive hazards affect men?

For a man, a reproductive hazard can affect the sperm. A hazard may cause a problem with the number of sperm, their shape, or the way that they swim. It could also damage the sperm's DNA. Then the sperm may not be able to fertilize an egg. Or it could cause problems with the development of the fetus.

How can reproductive hazards affect women?

For a woman, a reproductive hazard can disrupt the menstrual cycle. It can cause hormone imbalance, which can raise the risk of diseases such as osteoporosis, heart disease, and certain cancers. It can affect a woman's ability to get pregnant.

A woman who is exposed during pregnancy can have different effects, depending on when she was exposed. During the first 3 months of pregnancy, it might cause a birth defect or a miscarriage. During the last 6 months of pregnancy, it could slow the growth of the fetus, affect the development of its brain, or cause preterm labor.

How can reproductive hazards be avoided?

To try to avoid reproductive hazards:

  • Avoid alcohol and illegal drugs during pregnancy.
  • If you smoke, try to quit. And if you are not a smoker, don't start.
  • Take precautions if you are using household chemicals or pesticides.
  • Use good hygiene, including handwashing.
  • If there are hazards at your job, make sure to follow safe work practices and procedures.

Frequently Asked Questions

Immediately inform your employer and occupational health department; seek medical evaluation from a healthcare provider experienced in maternal-fetal medicine; consider testing for specific toxins if available; and follow any recommended protocols to reduce further exposure and monitor fetal development through ultrasounds and other prenatal assessments.===
Common workplace chemicals that can harm reproductive health include pesticides, solvents such as benzene and toluene, industrial chemicals like phthalates and bisphenol A, heavy metals such as lead and mercury, and certain cleaning agents that contain chlorine or ammonia. These substances can enter the body through inhalation, skin contact, or ingestion and may affect hormone levels, sperm quality, or fetal development.
Use appropriate personal protective equipment (PPE) such as gloves, goggles, and respirators; ensure proper ventilation or fume hoods; follow safe handling procedures; keep work areas clean to reduce skin contact; and regularly monitor your exposure levels through workplace health and safety programs. If possible, substitute safer chemicals or implement engineering controls to minimize exposure.
Changes in menstrual cycle timing or flow, unexplained infertility, decreased sperm count or motility, abnormal sperm morphology, early miscarriage, or birth defects in children can all be signs of reproductive hazard exposure. If you notice any of these changes, seek medical evaluation and discuss potential occupational exposures with your healthcare provider.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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