What does viability mean, and how likely is a fetus to be viable at 22 weeks? At 26 weeks? Why would this vary depending on whether a person lives in a developed or a developing country? What is the main obstacle to viability even by the beginning of the third trimester?

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The Answer of What does viability mean, and how likely is a fetus to be viable at 22 weeks? At 26 weeks? Why would this vary depending on whether a person lives in a developed or a developing country? What is the main obstacle to viability even by the beginning of the third trimester?

What Does Viability Mean, and How Likely Is a Fetus