It is sperm that has 2 heads instead of 1 but, don't worry its very common!:)
Double-headed sperm, or sperm with abnormal morphology, can contribute to fertility issues, but they are not directly linked to causing birth defects in offspring. If such sperm fertilize an egg, the resulting embryo may have a higher chance of developmental problems due to genetic abnormalities. However, many factors influence birth defects, including genetic, environmental, and maternal health aspects. Therefore, while abnormal sperm can impact fertility, they are not a definitive cause of birth defects.
The Yellow-headed Amazon (or Double Yellow-headed Parrot) comes from Mexico and Northern Central America.
See related links for a picture of a cursor double-headed arrow.
On the drawing toolbar, go to autoshape->connectors, and the double arrow is in there.
If your asking about 1963 Double Headed Lincoln cents? No authentic mint errors exist.
a double headed snake with no tail, what does it mean?
A double-headed axe is commonly referred to as a "bipennis" in historical contexts. In modern terminology, it is often called a "tomahawk" or simply a "double-headed axe." These axes have been used in various cultures, often symbolizing power and warfare.
Double-headed eagle
Dhol are types of double-headed drums.
I have a 1994 quarter double date, what is the worth ?
No. The only double headed coin to circulate in the US was an undated George Washington Cent minted sometime between 1783 and 1793.
double-headed spikes