Jepchirchir finished with a time of 2:27:20, 16 seconds ahead of Kosgei.
Peres Jepchirchir of Kenya, Roza Dereje of Ethiopia, Melat Yisak Kejeta of Germany and Lonah Chemtai Salpeter of Israel in action REUTERS
Seidel, competing in just her third marathon after moving up from shorter distances, finished 26 seconds behind.
Peres Jepchirchir of Kenya, Ruth Chepngetich of Kenya, Yevheniya Prokofyeva of Ukraine and Mao Ichiyama of Japan in action REUTERS
Battling hot and humid conditions, Chepngetich dropped out around the 30km mark, while Israel’s Lonah Chemtai Salpeter dropped out at the 38km stage after looking like a strong contender for bronze.