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    yolk sac

    US

    ・

    UK

    A1
    n.NounA membranous sac containing yolk attached to the embryo of reptiles, birds, and mammals, providing early nourishment.
    The yolk sac provides nourishment to the early embryo.

    Video subtitles

    Life in Japan Looks Very Different Now… We’re Having a Baby

    38:01Life in Japan Looks Very Different Now… We’re Having a Baby
    • And they found the yolk sac.

      And they found the yolk sac.

    • And they found the yolk sac.

      And they found the yolk sac.

    A2