Gestation

believe the increased progesterone from pregnancy comes from the corpus luteum, the placenta, or both. The purpose of this study is to detect pregnant and nonpregant females by creating a standard classifying system of detecting progesterone in early gestation periods and to estimate reproductive failures in the preceding breeding season. Fur seals were captured before implantation with a hoopnet and sedated. The animals were tagged and syringed for blood. Progesterone sampling was every…

early labor and preterm birth. There are, however, some risk factors that seem to be associated with preterm birth. These include having a previous preterm birth, having a short cervix, a short interval between pregnancies, multiple simultaneous gestations, and some “lifestyle factors” such as smoking or substance abuse during pregnancy. What can be done to stop or slow down the birthing process? Once a woman goes into labor prematurely, not much can be done to stop a preterm birth. Steroid…

In the pro-oestrous stage of the cat’s oestrous cycle, the queen may start showing the first pro-oestrous behaviours, and these could start as early as four months of age. These behaviours include being more vocal than usual, restless and having an increased appetite. She may also show behaviours such as rolling on the floor and rubbing against objects. During this stage, the ovaries start to form follicles. Unlike in dogs, the vulva of the queen will only enlarge slightly and will appear…

Twin studies aid in strengthening the correlations between fetal environment, low birth weight, and adult disease. On average, twins have lower than average birth weight as they experience reduction in growth during their third trimester due to limitations in size of the uterus (Vagero & Leon, 1994). Research involving monozygous and dizygous twins has determined that the lighter twin was more likely to develop higher blood pressure and have increased cardiovascular disease risk (Baird, Osmond,…

for the calcium"(Edmonds). The gestation period for a great white shark is estimated to be between 12 and 18 months. Baby sharks are called pups. Mother sharks tend to have litters consisting of 10 pups. There have been cases where there have been as many as 17 pups in a litter. Scientists believe that female great white sharks reproduce every other year because of the lengthy gestation period. Scientists are trying to learn what they can about the gestation period of the great…

Brain death is a concept used in situations in which life-support equipment obscures the conventional cardiopulmonary criteria of death, and it is legally recognized in most countries worldwide. Brain death during pregnancy is an occasional and tragic occurrence. The mother and fetus are two distinct organisms, and the death of the mother mandates consideration of the well-being of the fetus. Where maternal brain death occurs after the onset of fetal viability, the benefits of prolonging the…

“Your pregnant.” Those two words will change your life. Whether the news of your pregnancy changes your life for the better, or the news causes your life to go down hill, it will undoubtedly change your life. So now, you must decide what to do. Will you keep the baby? Put him or her up for adoption? Or, will you abort the fetus? Abortion is one of the leading controversial social justice topics people face. Each person has their own opinions and beliefs about abortion. When people have an…

3. Transverse cerebellar diameter measurement (TCD) : The cerebellar view is obtained by rotating the transducer in the axial plane centered on the thalamus to show the cerebellar hemispheres. This view shows the cerebellum, the cistern magna and the cavum septum pellucidi. The cerebellum characteristically appears as two lobules in either side of midline in the posterior cranial fossa. The widest diameter of the cerebellum is measured(16). Fig. 5: Ultrasonographic Measurement of Transverse…

full term is considered to be small for gestation. Babies born small for gestation are 7 times more likely to die than infants at a normal birth weight. They are also more prone to decrease in neurological development and cognitive development. Preterm babies are more likely to achieve normal heights and weights then babies born small for gestation. Mothers who smoke, abuse drugs, or are malnourished put their unborn child at risk of being small for gestation. These babies are normally shorter…

short period of time. Different model organisms are utilized in many different ways. In the case of this experiment, a model organism must have a rapid rate of maturation and reproduction. The use of Drosophila (fruit fly) was chosen for its fast gestation period and ease of trait comparison between generations (Cartier and Stewart, 2000). This allows for scientists to gather multiple generations worth of data in a short period of time to see the inheritance pattern. This will allow them to…