Video Experimental Relacionado
Updated: Jul 24, 2026
08:19
Isolation of Leukocytes from the Human Maternal-fetal Interface
Published on: May 21, 2015
La progesterona transdérmica micronizada y la respuesta endometrial
Lancet (London, England)
|October 30, 1999
Resumen
La progesterona transdérmica secuencial no elevó adecuadamente los niveles sanguíneos ni estimuló los cambios endometriales cuando se administró con estrógeno transdérmico continuo. Este enfoque de terapia hormonal fue insuficiente para lograr la respuesta secretora endometrial deseada.
Área de la Ciencia:
- Endocrinología Endocrinología.
- Biología Reproductiva Biología Reproductiva.
- Ginecología Ginecología.
Sus antecedentes:
- El estrógeno transdérmico continuo se utiliza para la terapia de reemplazo hormonal.
- La progesterona es crucial para preparar el endometrio para la implantación.
- La optimización de la administración transdérmica de progesterona junto con el estrógeno requiere más investigación.
Objetivo del estudio:
- Evaluar la eficacia de la progesterona transdérmica secuencial en el logro de una adecuada transformación endometrial.
- Para evaluar el impacto de este régimen en los niveles de progesterona circulante.
Principales métodos:
- Administración de progesterona transdérmica secuencial con estrógeno transdérmico continuo.
- Monitoreo de las concentraciones de progesterona en la sangre circulante.
- Evaluación de la respuesta endometrial (examen histológico para detectar cambios secretorios).
Principales resultados:
- La progesterona transdérmica no logró aumentar significativamente las concentraciones de progesterona circulante.
- El régimen fue insuficiente para inducir una respuesta secretora en el endometrio proliferante.
Conclusiones:
- La progesterona transdérmica secuencial, cuando se combina con estrógeno transdérmico continuo, no es un método eficaz para lograr cambios secretorios endometriales.
- Pueden ser necesarios métodos de administración alternativos u optimizados para la progesterona transdérmica.
Videos de Conceptos Relacionados
01:38Fertilization
During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
01:15Transcytosis of IgG
Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
01:07Teratogenicity
The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
01:24Gonadal and Placental Hormones
The gonads, namely the testes in males and the ovaries in females, are pivotal in producing gonadal hormones that orchestrate the intricate processes of sexual development and reproduction.
In males, testosterone is the primary gonadal androgen. It plays a central role in the maturation of male reproductive organs — the penis and testes. Additionally, testosterone is instrumental in the development of secondary sexual characteristics — a deep voice as well as facial and pubic hair growth — and...
In males, testosterone is the primary gonadal androgen. It plays a central role in the maturation of male reproductive organs — the penis and testes. Additionally, testosterone is instrumental in the development of secondary sexual characteristics — a deep voice as well as facial and pubic hair growth — and...
01:27Ovarian Cycle
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 length...
01:21Intrauterine Drug Delivery Systems
Controlled-release systems for intravaginal and intrauterine drug delivery have been developed primarily for the administration of contraceptive steroid hormones. These delivery routes circumvent first-pass hepatic metabolism, thereby enhancing bioavailability and allowing for reduced systemic dosages compared to oral administration. Such approaches contribute to improved therapeutic efficacy and patient compliance, particularly in long-term contraceptive regimens.Intravaginal Drug Delivery...