Male pouch is the equivalent of the uterus of female mammals.
in 1970 also showed that when non-pregnant male seahorses were exposed to the fish version of oxytocin , they expressed labor-like behaviors.
Using 3D imaging techniques combined with microscopy, we then compared the body structure of male and female pot-bellied seahorses. Similarly, during labor, male seahorses bend their body towards the tail, pressing and then relaxing. This “pressing” behavior is accompanied by brief gaping of the pouch opening, with a series of whole-body jerks. This movement combined with pouch opening allows seawater to flush through the pouch.
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