Table 3. Review of reports of the sex ratio of offspring in assisted-conception pregnancies
Author (year) Country Number of births ART treatment Sex ratio (% of male)
Hentemann et al. (2009) Single institution (Norway) 420 ICSI
Blastocyst
(IVF)		 0.69
1.17
Luke et al. (2009) Society for Assisted Reproductive Technology National Database (USA) 15,164 Blastocyst
(ICSI)		 0.98
Dean et al. (2010) Fertility clinics in Australia and New Zealand 13,368 IVF
Blastocyst
(IVF)		 1.13
1.27
Maalouf et al. (2014) United Kingdom 106,066 IVF
ICSI
Blastocyst
(IVF+ICSI)		 1.08
0.96
1.27
Arikawa et al. (2016) Japan 27,158 IVF
ICSI		 1.13
0.92
Current study Ryukyu University Hospital 290   No significant differences in sex ratio