Fig. 2From: Progesterone initiates tendril formation in the oviducal gland during egg encapsulation in cloudy catshark (Scyliorhinus torazame)Effects of P4 implantation in the initial experiment. A Dark-colored, swollen oviducts were found in the abdominal cavity. B Long and coiled tendrils were found in the oviduct. C Egg-capsule of cloudy catshark. Arrows indicate tendrils extending from the four corners of egg-capsule. Scale bars, 1Â cmBack to article page