Twin - Wikipedia
网页Twins can be either monozygotic ('identical'), meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic ('non-identical' or 'fraternal'), meaning that each twin develops from a separate egg and each egg is fertilized by its own sperm cell. [2]
Types of Twins: Identical, Fraternal, and Other Unique Types
网页2023年4月25日 · In a basic twin pregnancy, two embryos go their separate ways and develop into twin babies, whether identical or fraternal. Some unique sets of twins follow a different path.
Twin Definition & Meaning - Merriam-Webster
网页1. : born with one other or as a pair at one birth. my twin brother. twin girls. 2. a. : made up of two similar, related, or connected members or parts : double. b. : paired in a close or necessary relationship : matching. c. : having or consisting of two identical units.
Understanding Twins - Psychology Today
网页Understanding Twins. The special relationship between twins allows researchers to examine the differences between genetic and environmental influences over both physical and mental health, as...
The Lives and Relationships of Twins | Psychology Today
网页The Lives and Relationships of Twins. At the core of many people’s fascination with twins is the belief that, at least in the case of identicals, their minds are as similar as are their bodies...
TWIN Definition & Meaning | Dictionary.com
网页noun. either of two persons or animals conceived at the same time. ( as modifier ) See also identical fraternal. a twin brother. either of two persons or things that are identical or very …
TWIN | definition in the Cambridge English Dictionary
网页TWIN meaning: 1. either of two children born to the same mother on the same occasion: 2. one of two very similar…. Learn more.
What Are the Different Types of Twins?
网页2023年3月15日 · There Are More Types of Twins Than You Might Think. The differences between identical, fraternal and six other types of twins. Sometimes, good things come in pairs. Two peas in a pod. Two thumbs ...
Identical Twins: DNA, Conception, Statistics, and More
网页2022年3月9日 · Identical twins, also known as monozygotic twins, share the same egg at conception and are always either both boys or both girls. Fraternal twins, also known as dizygotic twins, come from two separate eggs fertilized at the same time. They could be the same sex or different.
Having Twins? Here’s What You Need to Know - Healthline
网页2015年8月5日 · Having Twins? Here’s What You Need to Know. Congratulations, you’re having a baby! No, you’re not seeing double, you’re just carrying twins. Get ready to double up on just about everything. Twins...
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