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