Conception Says It Has Made the First Human Eggs From Stem Cells

The biotech company led by Matt Krisiloff says it generated early-stage human egg cells from stem cells, an in-vitro gametogenesis milestone with the potential to reshape fertility.

Conception Says It Has Made the First Human Eggs From Stem Cells The biotech company led by Matt Krisiloff says it generated early-stage human egg cells from stem cells, an in-vitro gametogenesis milestone with the potential to reshape fertility. Aaron Rafferty June 30, 2026 Key Takeaways Conception, a biotech led by Matt Krisiloff, says it has generated the first early-stage human egg cells from stem cells. The approach, called in-vitro gametogenesis, aims to turn a person's skin or blood cells into eggs, which could reshape fertility treatment. The result is an early research milestone, not a clinic-ready procedure, and it raises scientific and ethical questions that remain unresolved. Conception , a biotech company working on lab-grown human eggs, says it has reached a milestone researchers have chased for years, generating the first early-stage human egg cells from stem cells. The company, led by chief executive Matt Krisiloff, works on in-vitro gametogenesis , the science of making eggs or sperm from ordinary cells. The idea is to take an induced pluripotent stem cell, which can be made from a single skin or blood cell, and coax it through the steps a body uses to build an egg. Conception grows clusters of supporting cells, a kind of mini-ovary, to nurture those early cells toward maturity. Imaging the company shared labels an early egg cell and the helper cells around it, all grown from stem cells. Why it matters If the technique can be carried all the way to a mature, usable egg, it could open fertility options for people who cannot produce viable eggs today, including older patients and same-sex couples. Krisiloff said the work shows "the potential to redefine fertility is real." The result is still early. These are immature egg cells, not eggs ready for fer