Indeed, considering all the things that happen that allow a baby to grow inside a female body but are absent in males, it is in my opinion a more realistic hope for some futuristic sci-fi science to invent a robotic body having not only the capacity to keep a human brain alive but also a perfectly functioning artificial womb capable of growing a cloned human baby than to figure out a way for pregnancy to occur in a male of any species. Even the famed seahorse isn't a true example of male pregnancy, but is as close as any animal on Earth comes to that, having a pouch like a kangaroo in which to scoop up its mate's eggs after fertilization and carry them around until they hatch.