Final answer:
Two individuals of the same biological gender cannot have a child naturally, as human reproduction requires male and female gametes. While parthenogenesis allows asexual reproduction in some species, it doesn't apply to humans.
Step-by-step explanation:
It is not possible for two individuals of the same biological gender to have a child naturally without any human interference. In human reproduction, both male and female gametes are required for the formation of a genetically unique individual. While some animals can reproduce asexually through a process called parthenogenesis, this is not possible in humans. The development of a child in humans relies upon the combination of a sperm and an egg, containing genetic material from both parents.
Any exception to this would require medical technology, such as in vitro fertilization. In cases involving transgender men, who retain functional female reproductive systems, pregnancy can occur using alternative reproductive methods, but this is not considered natural reproduction as it involves human intervention. Furthermore, same-sex couplings observed in non-human species are not indicative of natural reproductive capabilities but rather behavioral expressions.