A gel that has prevented almost all of 1 billion sperm getting past the cervix in sheep could become an alternative to hormonal birth control methods but without the side effects
at KTH Royal Institute of Technology in Sweden and her colleagues have developed a hormone-free vaginal gel that may work as well as hormonal contraceptives but without the side effects.
The researchers used a syringe applicator to insert the gel towards the backs of the vaginas of sheep, which are similar to those in humans. An hour later, they artificially inseminated each of the eight sheep tested with 1 billion sperm.
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