In mammals, pregnancy is the period of reproduction during which a female carries one or more live offspring from implantation in the uterus through gestation...

within the parent). It is typical for mammals, but also occurs for some non-mammals. Mammals during pregnancy can have one or more gestations at the...

in placental mammals varies from 18 days in jumping mice to 23 months in elephants. Generally speaking, fetuses of larger land mammals require longer...

Ectopic pregnancy is a complication of pregnancy in which the embryo attaches outside the uterus. Signs and symptoms classically include abdominal pain...

beast') is a subclass of mammals amongst the Theriiformes. Theria includes the eutherians (including the placental mammals) and the metatherians (including...

possible pregnancy by thickening the protective layer around the endometrial wall, while non-menstruating placental mammals do not begin the pregnancy process...

period), and care of the newborn. Strophosomia Wikimedia Commons has media related to Veterinary obstetrics. Pregnancy (mammals) Theriogenology v t e...

testes in mammals Sexual reproduction § Mammals Sex organ § Mammals Human reproduction Animal sexual behavior § Mammals Pregnancy (mammals) Equine reproductive...

A mammal (from Latin mamma 'breast') is a vertebrate animal of the class Mammalia (/məˈmeɪli.ə/). Mammals are characterized by the presence of milk-producing...

the exception and can be exceptionally rare in the largest mammals. A multiple pregnancy may be the result of the fertilization of a single egg that...

of mammal gestation period estimated by experts in their fields. The mammals included are only viviparous (marsupials and placentals) as some mammals, which...

in mammals. There is considerable variation between species in the length of pregnancy. At least one group of fish has been named after its pregnancy characteristics...

chorioallantoic placenta, similar to those of placental mammals. The fetus usually develops fully in placental mammals and only partially in marsupials including kangaroos...

goats, it can happen without pregnancy. Nearly every species of mammal has teats; except for monotremes, egg-laying mammals, which instead release milk...

contains all mammals more closely related to placentals than to marsupials. Placental mammals are anatomically distinguished from other mammals by: a sufficiently...

there were many synapsid species that looked like mammals. The lineage leading to today's mammals split up in the Jurassic; synapsids from this period...

other mammals, including other apes, Old World monkeys, some species of bat, the elephant shrew and the Cairo spiny mouse. In most other mammals, the endometrium...

In obstetrics, gestational age is a measure of the age of a pregnancy taken from the beginning of the woman's last menstrual period (LMP), or the corresponding...

(2000). "The plasma membrane transformation facilitates pregnancy in both reptiles and mammals". Comparative Biochemistry and Physiology A. 127 (4): 433–439...

Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic ('identical'), meaning that they develop from one zygote, which...

Interspecific pregnancy (literally pregnancy between species, also called interspecies pregnancy or xenopregnancy) is the pregnancy involving an embryo...

Maternal physiological changes in pregnancy are the adaptations that take place during pregnancy that enable the accommodation of the developing embryo...

of more than one stage of developing offspring in the same animal. In mammals, it manifests as the formation of an embryo from a subsequent menstrual...

reproductive structures; and some other non-mammals, such as some sharks, also bear live young. In sex determination for mammals, female is the default sex, while...

peculiar and, it seems to me, an inexplicable fact is, that previous pregnancies have an influence upon offspring. This is well known to breeders of animals...

are a defining characteristic of placental mammals, but are also found in marsupials and some non-mammals with varying levels of development. Mammalian...

interrupted by anestrous phases, otherwise known as "rest" phases, or by pregnancies. Typically, estrous cycles repeat until death. These cycles are widely...

only mammals which permanently develop breasts at puberty; all other mammals develop their mammary tissue during the latter period of pregnancy; at puberty...

in Australia. Mammals portal Marsupial lawn Metatheria List of mammal genera List of recently extinct mammals List of prehistoric mammals This is supported...

shrews, also called jumping shrews or sengis, are small insectivorous mammals native to Africa, belonging to the family Macroscelididae, in the order...