An ethnographic survey in Mexico City lets us establish correlations between diversity, exclusion and homo-parenting through discourses, practices and representations of aspiring parents who turn to surrogacy and other medically assisted procreation techniques. In what sense—in line with sexual orientation and gender—do aspiring parents react to the possibility that gamete-donors or surrogates may participate in their child’s procreation? How is the desire to have a child, by medical means, related to alliance or family type? What obstacles do aspiring heterosexual, homosexual and single parents face when they choose assisted reproduction? The article reveals that social class-, gender- and age-related constants are definitive. Religious affiliations and political activism—not always considered in assisted-reproduction studies—have come back to the fore in previously unforeseen ways.