Serial entrepreneur Martin Varsavsky said he is talking to several private equity firms about setting up a fertility platform that targets consumers at their most fertile. Mr. Varsavsky, who earlier this year sold Spanish broadband and cellphone operator Jazztel Telecom SA to Orange SA for 3.4 billion euros, said his new company, Prelude Fertility, challenges the current model of fertility clinics targeting consumers when it is already too late. “People aren’t achieving their maternity or paternity goals because they start too late,” Mr. Varsavsky said. “Humans are designed to be fertile in the teens and 20s, not late 30s and...