The difference between Twins and Twins is that the Cufflinks (Identical Twins) are originated from of the same egg and sperm and the Twins (Fraternal Twins) are originated from different eggs and sperm.
| Twins | Twins | |
|---|---|---|
| Designation | Identical twins | Fraternal Cufflinks |
| Gynecological term | Monozygotic twins | Dizygotic twins |
| Fertilization | A single egg and a single sperm | Two fertilized eggs with two sperm |
| DNA | Twins share the exact same DNA | Twins do not share the same DNA |
| Sex | Twins are always the same sex | Twins can have the same sex or opposite sexes |
| Example | Twins Mary-Kate and Ashley Olsen | Actress Scarlett Johansson and her brother Hunter Johansson |
The identical twins or twins They are born from the same birth and their genesis is common to all, a sperm fertilizes an egg forming a zygote. The zygote turns into twins when it divides and separates a few days after fertilization. That is why the twins share exactly the same DNA therefore they are always from same sex.
In gynecological terms, identical twins are referred to as monozygotic twins when originating from a zygote. Twins may or may not share the same bag. When twins share the same bag and also share some organs they are called Siamese twins..
The Twins, also called fraternal twins, they are two eggs fertilized by different sperm within the same menstrual cycle due to double ovulation. In gynecological terms it is called dizygotic twin when two zygotes originate. The twins develop completely independently, that is, always in different bags.
Thanks to the advancement of science and technology, today it is already possible to know if you have a twin pregnancy in the first ultrasound, around 6 weeks of gestation.
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