Abstract:
:Although there are fairly wide variations AFV normally undergoes characteristic changes across gestation in which it increases from 10-20 ml at 10 weeks gestation to average 800 ml at 24 weeks. Little change occurs from then until near term when AFV begins to decrease, and large decreases can occur in postterm pregnancies. Across gestation, 95% of AFVs are within the range of 1/2.57-2.57 times the gestational mean volume and 99% are within the range of 1/3.40-3.40 times the gestational mean. Although there are six pathways in which fluid and solutes can enter and/or leave the amniotic sac, there are only four primary pathways that contribute to AFV during late gestation. These include fetal urine and lung fluid secretion as the two primary sources of fluid, with fetal swallowing and intramembranous absorption as the two primary routes of amniotic water clearance. The intramembranous pathway also appears to be a primary source of amniotic solutes (e.g., sodium and chloride). Although fetal hypoxia has been widely believed to cause oligohydramnios, fetal hypoxic hypoxia and anemic hypoxia both appear to be associated with an increased AFV and polyhydramnios rather than oligohydramnios. It is speculated that the oligohydramnios associated with fetal hypoxia is caused by placental dysfunction in addition to the hypoxia.
journal_name
Clin Obstet Gynecoljournal_title
Clinical obstetrics and gynecologyauthors
Brace RAdoi
10.1097/00003081-199706000-00005subject
Has Abstractpub_date
1997-06-01 00:00:00pages
280-9issue
2eissn
0009-9201issn
1532-5520journal_volume
40pub_type
杂志文章,评审abstract::In mammalian reproductive physiology, lactation follows pregnancy; growing evidence suggests that disruption of this physiology affects a woman's lifetime risk of metabolic disease. These differences may reflect lactation-induced mobilization of fat stores and modulation of maternal stress reactivity. In addition, con...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/GRF.0000000000000155
更新日期:2015-12-01 00:00:00
abstract::Mothers with gestational diabetes mellitus (GDM) are at high lifetime risk of developing type 2 diabetes mellitus. The magnitude of risk for cardiovascular disease after GDM is less well established. Recently, intervention trials using lifestyle modification or medications used to treat type 2 DM have successfully pre...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/GRF.0b013e31815a61d6
更新日期:2007-12-01 00:00:00
abstract::Endometriosis is a chronic medical condition that affects around 6% to 10% of reproductive age women. Pelvic pain, dysmenorrhea, and infertility are the most common presenting symptoms. The disease is characterized by estrogen-dependent growth of the endometrial glands and stroma outside the endometrial cavity. The di...
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-199538040-00007
更新日期:1995-12-01 00:00:00
abstract::Medical methods for pregnancy termination in early gestation offer women an alternative to surgical evacuation and have the potential to improve access globally to safe abortion. Several drug regimens are used with varying efficacy including mifepristone plus misoprostol, misoprostol alone, and methotrexate plus misop...
journal_title:Clinical obstetrics and gynecology
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doi:10.1097/GRF.0b013e3181a2b026
更新日期:2009-06-01 00:00:00
abstract::Uterine rupture is an important cause of obstetrical hemorrhage associated with morbidity for mother and fetus. Risk factors should be discussed in the counseling process. Intrapartum findings including maternal condition, fetal heart rate monitoring, and uterine activity may prove helpful in making the diagnosis of a...
journal_title:Clinical obstetrics and gynecology
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更新日期:2010-03-01 00:00:00
abstract::The development of GnRH agonists has had a major impact on the practice of gynecology and reproductive endocrinology. The clinical usefulness of GnRH agonists will increase as modes of administration are improved and indications become better defined. GnRH agonists and, potentially, antagonists will provide a prompt, ...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-198909000-00019
更新日期:1989-09-01 00:00:00
abstract::Genitourinary syndrome of menopause (GSM) describes a collection of exam findings and bothersome symptoms associated with estrogen deficiency involving changes to the labia, introitus, clitoris, vagina, urethra, and bladder. Vulvovaginal atrophy is a component of GSM. GSM is a highly prevalent medical condition with a...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
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更新日期:2018-09-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/GRF.0b013e31828f273c
更新日期:2013-06-01 00:00:00
abstract::Urinary tract infection in women has its origin, predominantly, via ascending bacteria from the periurethral microflora. Asymptomatic bacteriuria, except for the pregnant patient, need not be treated. E. coli is the most common bacterium to cause UTIs, and is usually susceptible to oral antibiotics. Patients who are h...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-199809000-00030
更新日期:1998-09-01 00:00:00
abstract::The responsibility of the physician for viral infections in pregnancy has changed dramatically in the last 15 years. Genital herpes infections have become much more frequent, and the recognition of these infections in women near term is particularly important. Cytomegaloviruses have been found to be the most commom ca...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/00003081-197806000-00018
更新日期:1978-06-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/01.grf.0000211946.51712.42
更新日期:2006-12-01 00:00:00
abstract::In selected patients who are hemodynamically stable with an unruptured tubal pregnancy, systemic methotrexate has success rates comparable to laparoscopic salpingostomy. Larger randomized studies are necessary to adequately assess subsequent fertility. Local injection of methotrexate or other agents requires a sonogra...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-199806000-00019
更新日期:1998-06-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
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更新日期:2011-03-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-198803000-00007
更新日期:1988-03-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/GRF.0000000000000291
更新日期:2017-09-01 00:00:00
abstract::Osteoporosis is frequently called the silent disease because it lacks symptoms or signs until a fracture has occurred. Osteoporosis is common in aging women because of progressive postmenopausal bone loss. Fractures related to bone loss can result in reduced quality of life, lengthy hospital stays, long-term instituti...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/GRF.0b013e31825caa50
更新日期:2012-09-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/00003081-199312000-00012
更新日期:1993-12-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
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更新日期:1987-12-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-199012000-00007
更新日期:1990-12-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
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更新日期:2013-03-01 00:00:00
abstract::Nothing improves the subsequent care of a woman with endometrial cancer more than the accurate determination of the extent of her disease. A significant number of women whose malignancy is apparently confined to the uterus will have extrauterine disease after careful, complete surgical staging. The failure to detect a...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-199609000-00014
更新日期:1996-09-01 00:00:00
abstract::Prevention of spontaneous preterm birth is an important public health priority. Pessary may be a potential therapy in cases of cervical insufficiency, in singleton and multiple gestations. Availability of transvaginal sonography for accurate assessment of cervical length is allowing for the tailoring of therapy to a m...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
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更新日期:2016-06-01 00:00:00
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journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-199703000-00008
更新日期:1997-03-01 00:00:00
abstract::Most operative office surgery can be done easily. If, midway through a procedure in the office, the operator finds that a myoma is too large or deep to resect safely in the office, the procedure can be terminated and rescheduled for the operating room. Polyps, retained products, and the lost intrauterine device all ca...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:
更新日期:1992-06-01 00:00:00
abstract::The relationship between the clinical state of the cervix and spontaneous onset of labor has long been known. The cervix can be characterized by evaluating five parameters: effacement, dilatation, firmness, position, and level of the presenting part. The relative associations between successful labor induction and the...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1097/00003081-199506000-00005
更新日期:1995-06-01 00:00:00
abstract::The development of the fetal adrenal medulla can be considered an integral part of the complex process of maturation and preparation of the fetus for extrauterine life. Our understanding of the fetal sympathoadrenal function is facilitated by the relative separation that exists between the maternal and fetal catechola...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章,评审
doi:
更新日期:1980-09-01 00:00:00
abstract::State Perinatal Quality Collaboratives (PQCs) represent a major advance for scaling up quality improvement efforts for reducing maternal mortality and severe maternal morbidity. The critical roles of partners, rapid-cycle low-burden data systems, and linkage to maternal mortality review committees are reviewed. The ch...
journal_title:Clinical obstetrics and gynecology
pub_type: 杂志文章
doi:10.1097/GRF.0000000000000361
更新日期:2018-06-01 00:00:00