Kaksoisiksi

Kaksoisiksi is a Finnish term that translates to "twins" in English. It specifically refers to dizygotic twins, also known as fraternal twins. These are two babies that develop from two separate eggs fertilized by two separate sperm. Unlike identical twins (monozygotic twins), dizygotic twins share only about half of their genetic material, similar to any other siblings born at different times.

The occurrence of dizygotic twinning can be influenced by several factors, including maternal age, genetics, and ethnicity. Older mothers are more likely to have dizygotic twins, as are women who have previously given birth. Certain fertility treatments, such as in vitro fertilization, can also increase the chances of having dizygotic twins.

Dizygotic twins can be of the same sex or different sexes. Because they develop from separate eggs and sperm, their physical appearances can vary significantly, much like non-twin siblings. They are distinct individuals with their own unique genetic makeup. The term "kaksoisiksi" in Finnish specifically denotes this type of twinning, differentiating it from identical twins.