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Short snouted seahorses are considered ovoviviparous meaning that the female deposits eggs into a pouch on the males stomach, called a brood pouch, and the male goes through pregnancy and labour. [9] Sexual maturation occurs during the first reproductive season after birth.
The male seahorse is equipped with a brood pouch on the ventral, or front-facing, side of the tail. When mating, the female seahorse deposits up to 1,500 eggs in the male's pouch. The male carries the eggs for 9 to 45 days until the seahorses emerge fully developed, but very small. The young are then released into the water, and the male often ...
A pregnant Southern platyfish. Pregnancy has been traditionally defined as the period of time eggs are incubated in the body after the egg-sperm union. [1] Although the term often refers to placental mammals, it has also been used in the titles of many international, peer-reviewed, scientific articles on fish.
Pygmy seahorses, about the size of a fingernail, are some of the smallest vertebrates in the world. First discovered in 1969, little was known about the creatures. But in the early 2000s, British ...
The researchers studied 46 such parabiotic pairs. In over half of the pairs, neither the male nor female became pregnant with normal embryos; in about one-third of the pairs, only the female became thus pregnant; and in six pairs, both the female and male became pregnant. There were no pairs in which only the male parabiont rat became pregnant. [7]
This species is ovoviviparous, with males carrying eggs before giving birth to live young. The female deposits her eggs into the male's brood pouch. Through the pregnancy the pair strengthens their pair bonds with daily greetings. [7] The gestation period for H. barbouri is 12–14 days, with a typical brood size of about 10–240 offspring ...
They also are crucial for attaching an embryo to the uterine lining of a female. [8] Due to their high importance, trophoblasts play a key role in interspecific pregnancy success. [8] For example, the placental glycosylation pattern at the fetomaternal interface should optimally be similar to that of the host species. [13]
Staff determined Charlotte became pregnant through a process called parthenogenesis, which is an asexual reproduction where a female can produce an embryo without fertilizing an egg with sperm.