Leeds (UK), July 23 (The Conversation) As humanity plans expeditions to Mars, intriguing questions arise about how the human body will adapt. Notably, might a human conceive, carry, and give birth during such an extended interplanetary mission? On Earth, about two-thirds of human embryos perish before birth, most lost in the first weeks post-fertilization, often unnoticed as embryos fail to develop or implant correctly in the womb.
Biological Challenges Pregnancy involves a sequence of biological milestones. Each step must occur in a precise order, with varying odds of success. While Earth offers estimates on these odds through clinical studies, my recent research delves into interplanetary space's extreme conditions affecting pregnancy phases.
Microgravity Effects Microgravity, experienced during space travel, might make conception physically challenging but probably won’t hinder embryo implantation. However, childbirth and newborn care are significantly more challenging without gravity to assist in positioning and feeding, as everything floats in space.
Living in Microgravity Interestingly, a fetus already develops in a microgravity-like environment, floating in amniotic fluid, similar to astronauts training in water tanks designed to emulate weightlessness, but there's more to consider than just gravity.
Radiation Exposure Outside Earth’s protective atmosphere, cosmic rays pose a significant threat. These high-energy particles, “stripped-down” atomic nuclei, hurtle through space, potentially causing cellular damage upon collision. Earth shields us from most cosmic radiation, but this protection vanishes in space.
When cosmic rays pass through the body, they can disrupt atoms, sometimes leading to dangerous DNA mutations, increasing cancer risk. While cosmic rays might miss cells, they could spark inflammatory responses, causing broader disruptions.
Embryo Vulnerability In pregnancy's initial weeks, embryonic cells are highly active, dividing and forming early structures. A cosmic ray can be deadly to an embryo without severe protection, though such direct hits are unlikely yet not impossible, resulting in potential unnoticed miscarriages.
Changing Risks By the end of the first trimester, when placental circulation is established, pregnancy risks shift. The growing uterine target makes a cosmic ray hit more plausible, potentially causing contractions and premature labor, which is far riskier in space.
Postnatal Development Risks A baby born in space would face prolonged exposure to microgravity, affecting its development of postural reflexes. Space-borne infants might struggle with movements reliant on gravity, resulting in atypical development.
Moreover, constant cosmic radiation could harm a growing baby's brain, with lifelong impacts on cognitive and behavioral functions.
Space Birth: A Reality Check Could babies be born in space? Theoretically, yes. However, until radiation protection, premature birth prevention, and assured safe growth in microgravity are achievable, space pregnancies remain highly experimental—daunting challenges we’re not yet equipped to tackle. (The Conversation) NSA NSA
(Only the headline of this report may have been reworked by Editorji; the rest of the content is auto-generated from a syndicated feed.)