Table 5. Comparison between the birth prevalence of chromosome abnormalities in the current study and other national and international studies.

Study region	Total Cases	Congenital anomalies	Chromosome abnormalities	per 1,000 live births	Ref.
Current study	13,988	150	59	4.22	-
Riyadh, Saudi Arabia	28,376	296	79	2.78	(25)
Jedda, Saudi Arabia	98	-	78	2.8	(31)
Aljahraa, Kuwait	7,739	97	17	2.18	(19)
Assiut, Upper Egypt	5,000	103	28	5.6	(9)
Tokyo, Japan	14,835	-	93	6.27	(32)
Goa	8,551	166	40	4.7	(33)
Denmark	77,520	2,089	291	3.75	(34)
Wales, England	466,475	20,374	1,269	2.73	(35)