Do Lambskin Condoms Protect Against STDs?
Lambskin (natural membrane) condoms are a real, FDA-approved option for pregnancy prevention — but they're not equivalent to latex or polyurethane condoms when it comes to STD protection, and that distinction matters.
The material difference that matters
Lambskin condoms are made from a natural membrane (the intestinal lining of lambs) that's tightly woven enough to block sperm — which is why they're effective for pregnancy prevention — but the material has naturally occurring small pores that are still large enough for viruses to pass through. Bacteria and sperm are too large to get through; some viruses, including HIV and hepatitis B, are not.
Latex and polyurethane condoms don't have this issue — they're a continuous barrier without natural pores, which is why they're the recommended option when STD prevention (not just pregnancy prevention) is the goal.
Why people choose lambskin anyway
Some people prefer lambskin condoms for sensation, or because of a latex allergy. If STD prevention matters and latex is the issue, polyurethane or polyisoprene condoms are the better substitute — they maintain the solid viral barrier that lambskin lacks, without the latex allergen.
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