SCI-SERIAL-SPERMDONORS Ari Nagel, 45, poses for a portrait at Relief Market, Owerri, Imo, Nigeria on Friday 15, Jan. 2021. Mr Nagel is a math professor at City University of New York who donates his sperm to women across the world. He sometimes meets women in public spots, such as Target stores, to hand off his sperm to them and other times travels across continents to deliver them; the reason he was visiting Owerri, Nigeria. Mr. Nagel, who lives in Brooklyn, said he has 52 biological children, with 13 on the way. Women have flown him all over the world for his sperm, including to Israel, Southeast Asia, Ghana, Philippines, Zimbabwe and Nigeria; they pay his travel expenses, but he gives them the sperm for free. He believes his mission is to help women have babies. KC Nwakalor for The New York Times

SCI-SERIAL-SPERMDONORS Ari Nagel, 45, poses for a portrait at Relief Market, Owerri, Imo, Nigeria on Friday 15, Jan. 2021. Mr Nagel is a math professor at City University of New York who donates his sperm to women across the world. He sometimes meets women in public spots, such as Target stores, to hand off his sperm to them and other times travels across continents to deliver them; the reason he was visiting Owerri, Nigeria. Mr. Nagel, who lives in Brooklyn, said he has 52 biological children, with 13 on the way. Women have flown him all over the world for his sperm, including to Israel, Southeast Asia, Ghana, Philippines, Zimbabwe and Nigeria; they pay his travel expenses, but he gives them the sperm for free. He believes his mission is to help women have babies. KC Nwakalor for The New York Times

SCI-SERIAL-SPERMDONORS Portrait of Ari Nagel, 45, in Owerri, Imo, Nigeria on Friday 15, Jan. 2021. Mr Nagel is a math professor at City University of New York who donates his sperm to women across the world. He sometimes meets women in public spots, such as Target stores, to hand off his sperm to them and other times travels across continents to deliver them; the reason he was visiting Owerri, Nigeria. Mr. Nagel, who lives in Brooklyn, said he has 52 biological children, with 13 on the way. Women have flown him all over the world for his sperm, including to Israel, Southeast Asia, Ghana, Philippines, Zimbabwe and Nigeria; they pay his travel expenses, but he gives them the sperm for free. He believes his mission is to help women have babies. KC Nwakalor for The New York Times

SCI-SERIAL-SPERMDONORS Ari Nagel, 45, poses for a portrait at a busy road intersection in front of The Assumpta Cathedral, a catholic church that was built in the 1980's in Owerri, Imo, Nigeria on Friday 15, Jan. 2021. Mr Nagel is a math professor at City University of New York who donates his sperm to women across the world. He sometimes meets women in public spots, such as Target stores, to hand off his sperm to them and other times travels across continents to deliver them; the reason he was visiting Owerri, Nigeria. Mr. Nagel, who lives in Brooklyn, said he has 52 biological children, with 13 on the way. Women have flown him all over the world for his sperm, including to Israel, Southeast Asia, Ghana, Philippines, Zimbabwe and Nigeria; they pay his travel expenses, but he gives them the sperm for free. He believes his mission is to help women have babies. KC Nwakalor for The New York Times

SCI-SERIAL-SPERMDONORS Ari Nagel, 45, poses for a portrait in front of monuments at Hero’s park, Owerri, Imo, Nigeria on Friday 15, Jan. 2021. Mr Nagel is a math professor at City University of New York who donates his sperm to women across the world. He sometimes meets women in public spots, such as Target stores, to hand off his sperm to them and other times travels across continents to deliver them; the reason he was visiting Owerri, Nigeria. Mr. Nagel, who lives in Brooklyn, said he has 52 biological children, with 13 on the way. Women have flown him all over the world for his sperm, including to Israel, Southeast Asia, Ghana, Philippines, Zimbabwe and Nigeria; they pay his travel expenses, but he gives them the sperm for free. He believes his mission is to help women have babies. KC Nwakalor for The New York Times