Abstract:Lebanon is an eastern Mediterranean country with a small population of only 4 million (Abbas et al. 2020). It is characterized for its distinct human genetic, cultural, ethnic, and religious diversity (Haber et al. 2011). The average live twinning births rate in Lebanon is 18.9/1000 (Romanos & Borjac, 2018). Twins can be either monozygotic (MZ) or dizygotic (DZ). The difference between them is how they are formed during embryogenesis (Hoekstra et al. 2008). When a single sperm fertilizes a single egg, it s… Show more
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