They summoned the goddess Yogamaya and had her transfer the fetus with the womb of Devaki towards the womb of Rohini (Vasudeva's other wife who lived together with her sister Yashoda through the river Yamuna, within the village of cowherds at Gokulam). Consequently the kid conceived in a single womb https://digitalasset.b-cdn.net/SouthernCaliforniaSurrogacy/Becoming-A-Surrogate-In-Southern-California.html