Yolk sac - Membrane - Hatching Question???

Discussion in 'Incubating & Hatching Eggs' started by PeppermintHen, Jun 23, 2011.

  1. PeppermintHen

    PeppermintHen Songster

    Sep 5, 2007
    San Antonio, TX
    When does the yolk sac absorb in the chicks body? Im under the impression , the chicks yolk sac is absorbed in the body while the blood membrane is still out (umbilical cord like). When does the blood membrane severe on it own? At what stage?

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