Teratogens are anything potentially harmful to a developing fetus. These include but are not limited to: nicotine, alcohol, drugs, radiation, AIDS, rubella, etc. These cause structural abnormalities and abnormal cell masses to develop in the fetus which can lead to serious birth defects. Some examples of these are
* physical and cognitive developmental delays
* cleft palate * abnormal facial characteristics * mental retardation * growth defects * heart defects * abnormalities of the fingers and nails * impaired fine and gross motor skills * hearing loss * vision loss/blindness
* deformed and paralyzed limbs * small head size and brain
teratogen
No.
The level at which a teratogen becomes harmful is referred to as the teratogenic threshold. This threshold varies depending on the type of teratogen and the stage of development of the organism. Factors such as duration of exposure and genetic susceptibility can also influence the level at which a teratogen becomes harmful.
teratogen
Thalidomide.
Testosterone
in the first trimester
Exposure to high levels of ionizing radiation, such as from x-rays, nuclear fallout, or certain medical treatments, can be a teratogen that increases the risk of birth defects and developmental abnormalities in unborn babies. It is important for pregnant women to avoid unnecessary exposure to radiation and to follow safety protocols when undergoing medical procedures involving radiation.
teratogen
A teratogen is any substance or factor that can cause birth defects or developmental abnormalities in a growing fetus. These can include drugs, chemicals, infections, and other environmental factors that can negatively impact the development of the embryo or fetus during pregnancy.
Teratogen
A teratogen is an agent or factor that causes malformation of an embryo. It would be likely to result in a spontaneous abortion, another name for a miscarriage or loss of the unborn child.