During pregnancy, the breast is responsive to a complex interplay of hormones that cause tissue development and enlargement in order to produce milk.

During pregnancy, the cervix is blocked by a special antibacterial mucosal plug, which prevents infection, somewhat similar to its state during the infertile portion of the menstrual cycle.

During pregnancy in viviparous mammals, endogenous retroviruses ( ERVs ) are activated and produced in high quantities during the implantation of the embryo.

During the early days of pregnancy, the conceptus is mobile, moving about in the uterus until about day 16 when " fixation " occurs.

During menopause, estrone is the predominant circulating estrogen and during pregnancy estriol is the predominant circulating estrogen in terms of serum levels.

During season seven, a pregnancy storyline was written in for the B ' Elanna character.

During pregnancy, all women produce vasopressinase in the placenta, which breaks down ADH.

During pregnancy, even in the absence of preconception cardiovascular abnormality, women with Marfan syndrome are at significant risk of aortic dissection, which is often fatal even when rapidly treated.

During the 1980s, the show incorporated the real-life experiences of the show's cast and crew, including the death of Will Lee ( Mr. Hooper ) and the pregnancy of Sonia Manzano ( Maria ) to address affective concerns.

During pregnancy, testing can be performed on the placenta ( chorionic villus sampling ) or the fluid around the fetus ( amniocentesis ).

During the pregnancy ( usually later in it ), the woman may have glucose ( sugar ) in her blood at a higher than normal level.

* During pregnancy women experience CTS due to hormonal changes ( high progesterone levels ) and water retention ( which swells the synovium ), which are common during pregnancy.

During pregnancy, diabetic retinopathy may also be a problem for women with diabetes.

During her pregnancy with her last child, Marijke Christina, Princess Juliana contracted German measles.

During pregnancy, Bajoran women suffer from uncontrollable bouts of sneezing rather than morning sickness.

During check-ups, women will receive medical information over maternal physiological changes in pregnancy, biological changes, and prenatal nutrition including prenatal vitamins.

During the epidemic in the US between 1962 – 1965, Rubella virus infections during pregnancy were estimated to have caused 30, 000 still births and 20, 000 children to be born impaired or disabled as a result of CRS.

During a hyperemetic pregnancy, many woman complain of excessive saliva and an inability to swallow this saliva.

* During pregnancy

During pregnancy, high circulating concentrations of estrogen increase prolactin levels by 10-to 20-fold.

World Health Organization recommendation on Maternal Supplementation During Pregnancy states that " health benefits are expected for the mother and her developing fetus with little risk of detriment to either, from a daily supplement not exceeding 10, 000IU vitamin A ( 3000mcg RE ) at any time during pregnancy.

During menopause, estrone is the predominant circulating estrogen and during pregnancy estriol is the predominant circulating estrogen in terms of serum levels.

During pregnancy, the uterus presses the navel of the pregnant woman outward, however it usually retracts after birth.

During puberty, an increase in male sex hormones called androgens cause the follicular glands to grow larger and make more sebum.

During feeding, any excess fluid is excreted by the coxal glands, a process which is unique to argasid ticks.

During the scene, the intense experiences of both pain and pleasure trigger a sympathetic nervous system response, which causes a release of epinephrine from the suprarenal glands, as well as a dump of endorphins and enkephalins.

During the last gestation trimester, it is known that sebaceous glands produce vernix caseosa which protects the embryonic skin from amniotic water.

During puberty, the virus enters the mammary glands with migrating lymphocytes and infects proliferating mammary gland epithelial cells.

During rub-urination, the animal squats while urinating so that urine will run down the insides of its legs and onto its tarsal glands.

During the Brown trial, however, the state's most powerful Democratic newspaper, the Providence Daily Post, stated that Brown was a murderer, a man of blood, and that he and his associates, with the assistance of Republicans and Abolitionists, had plotted not only the liberation of the slaves but also the overthrow of state and federal governments.

During Dulles's first two years in office, while Republicans ran the Senate, the Department was at the mercy of men who had thirsted for its blood since 1945.

During a stroke, blood flow to the brain ceases.

During a visit to England he complained of dizziness and had to have his blood pressure checked on August 29, 1959 ; however, before dinner at Chequers on the next day his doctor General Howard Snyder recalled Eisenhower " drank several gin and tonics, and one or two gins on the rocks ... three or four wines with the dinner ".

During prolonged fasting or very low calorie diets, the reduction of blood glucose, the preferred energy source of the brain, causes the body to deplete its glycogen stores.

During the menstrual cycle or estrous cycle, the endometrium grows to a thick, blood vessel-rich, glandular tissue layer.

During this time, there will be innumerable wars and ties of blood will no longer be respected: the next-of-kin will lie together and brothers will kill brothers.

During this time, European manufacturers also began regularly purifying saltpeter, using wood ashes containing potassium carbonate to precipitate calcium from their dung liquor, and using ox blood, alum, and slices of turnip to clarify the solution.

During the acute withdrawal period systolic and diastolic blood pressure increase, usually beyond pre-morphine levels, and heart rate increases, which have potential to cause a heart attack, blood clot, or stroke.

During the day on the 14th of Nisan, they were to slaughter the animal and use its blood to mark their lintels and door posts.

During that time, though, they exist in huge numbers and can take up to 300ml of blood per day from each animal in a caribou herd.

During diastole, blood flows through the ostia from the pericardial sinus ( the cavity containing the heart ) into the heart.

During the compensated phase on insulin resistance insulin levels are higher, and blood glucose levels are still maintained.

During embryological development, new capillaries are formed by vasculogenesis, the process of blood vessel formation occurring by a de novo production of endothelial cells and their formation into vascular tubes.

During each heartbeat, blood pressure varies between a maximum ( systolic ) and a minimum ( diastolic ) pressure.

During travel it stops naturally and periodically when renewing its internal hydraulic blood pressure that, like most spiders, it requires to renew strength in the legs.

During plasma donation, the red blood cells are pumped back into the body right away and only the plasma is collected.

During defecation, the thoracic blood pressure rises, and as a reflex response the amount of blood pumped by the heart decreases.

During the initial stages of this process, blood glucose levels are maintained through gluconeogenesis, and the adult brain does not burn ketones.

During lethal rabies infection of mice, the blood – brain barrier ( BBB ) does not allow anti-viral immune cells to enter the brain, the primary site of rabies virus replication.

During his appeal in 1992, Irving called upon those present in the Munich courtroom to " fight a battle for the German people and put an end to the blood lie of the Holocaust which has been told against this country for fifty years ".