> VasalgelTM is a long-acting, nonhormonal contraceptive with a significant advantage over vasectomy: it is likely to be more reversible.
"It is likely to be more" does not sound very reassuring.
Right now, since they have a limited budget, they're just focusing on doing the studies they need to do to get approval for marketing it as a non-reversible contraceptive. Getting approval to market it as being reversible will come later.
IIRC, all of this is explained on their website, possibly in the FAQ.
Edit:
Yeah, more or less. From the FAQ --
"The idea is to develop a fully reversible long-acting male contraceptive, and recently-completed rabbit studies showed rapid restoration of sperm flow. This was accomplished by flushing the Vasalgel from the vas deferens with an injection of sodium bicarbonate (baking soda) solution. Additional reversibility studies must be completed before Vasalgel can be marketed as a reversible male contraceptive."
https://www.eurekalert.org/pub_releases/2017-04/pf-sro033117...
https://www.parsemus.org/contraceptives/reversal-whats-statu...