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Birth Control Methods01:22

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Vasectomy is a surgical form of male sterilization that involves severing and sealing the vasa deferentia, preventing sperm from mixing with semen during ejaculation. Because a vasectomy does not impact the testes' ability to produce testosterone, hormone levels, libido, and sexual function generally remain unchanged. While vasectomy is highly effective in preventing pregnancy, with a success rate near 99.85%, rare cases of recanalization (spontaneous reconnection) can occur. Although...
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The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
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The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
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The menstrual cycle includes a critical component known as the ovarian cycle, which undergoes two main phases each month—the follicular phase and the luteal phase. The follicular phase is variable and averaging around 14 days. Ovulation, triggered by a surge in luteinizing hormone (LH), marks the transition between the two phases. The second phase, the luteal phase, is relatively consistent, lasting approximately 14 days, and is marked by the activity of the corpus luteum. While a cycle...
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The enteral drug administration involves three primary routes: oral, sublingual, and buccal. Oral ingestion is the most prevalent, safe, economical, and convenient method for drug administration. However, it has certain drawbacks, including limited absorption due to the drug's low water solubility or poor membrane permeability, possible emesis from GI mucosa irritation, destruction of drugs by digestive enzymes or low gastric pH, and irregular absorption along with food or other drugs.
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Methods for Studying Uterine Contributions to Pregnancy Establishment in an Ovariectomized Mouse Model
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紧急避孕的荷尔蒙方法.

Raymond Hang Wun Li1, Sue Seen Tsing Lo1, Sharon Tracey Cameron2

  • 1Department of Obstetrics and Gynaecology, School of Clinical Medicine, The University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Pokfulam, Hong Kong; The Family Planning Association of Hong Kong, 10th Floor, 130 Hennessy Road, Wan Chai, Hong Kong.

Best practice & research. Clinical obstetrics & gynaecology
|September 7, 2024
PubMed
概括
此摘要是机器生成的。

口服紧急避孕 (EC) 选择包括乌利普里斯塔酸盐 (UPA) 和莱沃诺格斯特勒 (LNG). UPA比LNG更有效,这两种方法通过延迟排卵来预防怀孕,而不会影响植入.

关键词:
环氧激酶抑制剂 环氧激酶抑制剂荷尔蒙紧急避孕药 荷尔蒙紧急避孕药莱沃诺格斯特雷尔 (Levonorgestrel) 是一个类动物.这就是米费普里斯顿.乌利普里斯塔尔乙酸盐的使用情况

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科学领域:

  • 生殖健康 生殖健康
  • 药理学 药理学是指药理学的学科.

背景情况:

  • 口服紧急避孕 (EC) 对于生殖健康至关重要.
  • 乌利普里斯塔酸盐 (UPA) 和勒沃诺格斯特勒 (LNG) 是世卫组织推的口服EC方法.

研究的目的:

  • 为了比较UPA和LNG用于紧急避孕的疗效和副作用概况.
  • 审查当前口腔EC方法的作用机制和局限性.

主要方法:

  • 对欧盟使用的乌利普里斯塔酸盐和勒沃诺格斯特勒现有文献的综述.
  • 对药理作用的分析,包括排卵抑制和子宫内膜效应.
  • 对不同人群的疗效评估,例如BMI较高的女性.

主要成果:

  • 乌利普里斯塔酸盐 (UPA) 与莱沃诺格斯特勒 (LNG) 相比,显示出更高的疗效.
  • 无论是UPA还是LNG,都主要通过抑制或延迟排卵而起作用,并且不会阻止植入.
  • 在BMI超过26公斤/平方米或体重超过70公斤的女性中,液化天然气的有效性会降低.

结论:

  • UPA是一种比液化天然气更有效的口服EC选择,具有类似的副作用.
  • 米菲普里斯顿是一种替代的EC,但其可用性有限.
  • 对液化天然气释放子宫内器械和EC的循环氧酶抑制剂进行进一步的研究是有必要的.