Table 1

Eligibility criteria
Inclusion criteria Exclusion criteria
Women < 40 years old Women who conceived the fetus using artificial methods including in-vitro fertilization or intrauterine insemination
Aboriginal ancestry Women carrying more than one fetus
Pregnant with singleton Surrogate mothers
Women who suffer from severe chronic medical conditions including active cancer, severe infectious diseases including HIV, hepatitis B or C, or who are VDRL positive

Wahi et al.

Wahi et al. BMC Public Health 2013 13:608   doi:10.1186/1471-2458-13-608

Open Data