▎ 摘　　要

NOVELTY - The utility model claims a constant temperature ovum fetching device, comprising an ovum fetching needle, an operation handle, a guide tube and a storage test tube the rubber plug of the storage test tube is further provided with a negative pressure pipe, the negative pressure pipe is connected with the negative pressure source, the ovum is sucked by negative pressure; wherein: the guide pipe and the storage test tube are externally provided with a heating layer, the heating layer heating main body is graphene electric heating film, the graphene electric heating film inner surface is compounded with a heat conducting layer, the outer surface is compounded with a protective insulating layer, and the heating layer is provided with a temperature sensor; the graphene electric heating film and the temperature sensor are electrically connected with the temperature controller, and is supplied with power by the mobile power supply. The technology has smart design, simple structure and convenient characteristics, especially using graphene electrothermal film, not only fast heating, good heating uniformity, but also radiating the heat of the same wave band with the human body, especially suitable as heat preservation heat source of the ovum.