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Differences in Teenage Pregnancy Rates Among Five Developed Countries：The Roles of Sexual Activity and Contraceptive Use
Teenage Pregnancy Rates Contraceptive Use Sexual Activity
2009/9/16
Context: Adolescent pregnancy, birth, abortion and sexually transmitted disease (STD) rates are much higher in the United States than in most other developed countries.
Methods: Government statist...
Appraising the instantaneous secretory rates of luteinizing hormone and testosterone in response to selective mu opiate receptor blockade in late pubertal boys
instantaneous secretory rates luteinizing hormone testosterone selective mu opiate receptor blockade late pubertal boys
2009/2/23
The pulsatile properties of gonadotropin and testosterone release were examined before and after chronic mu opiate receptor blockade with naltrexone, 50 mg every other day, in four normal boys in la...
Changes in the number, proliferation rates, and bcl-2 protein immunoexpression of epithelial and periductal cells from rat epididymis during postnatal development
Basal cells cell proliferation
2009/2/18
To investigate 1) the correlation between the proliferative activity of epididymal epithelium plus myoid cells and the increase in the number of these cells and 2) the role of the basal epithelial c...
Extragonadal sperm reserves, sperm-depletion rates, numbers of sperm per mating, and fertility with successive matings by intact or unilaterally vasectomized rats
Extragonadal sperm reserves sperm-depletion rates sperm per mating
2009/2/17
Because of the high rates of sperm production and large extragonadal sperm reserves of sexually rested male rats, mating trials are insensitive for detecting test-induced alterations in sperm produc...
Evaluation of the effect of the absence of sperm with rapid and linear progressive motility on subsequent pregnancy rates following intrauterine insemination or in vitro fertilization
Sperm separation motility gradIng linear velocity
2009/2/16
The objective of this study was to investigate the association of rapid and linear progressive motility in seminal and Percoll-separated sperm with the outcome of intrauterine insemination (IUI) and...
Relationship between sperm motility assessed with the Hamilton-Thorn motility analyzer and fertilization rates in vitro
sperm motility Hamilton-Thorn motility analyzer fertilization rates
2009/2/7
To determine which sperm movement characteristics are related to in vitro fertilization rates, semen and swim-up preparations used for in vitro fertilization in 108 patients were assessed using the ...
Mice Lacking Raf Kinase Inhibitor Protein-1 (RKIP-1) Have Altered Sperm Capacitation and Reduced Reproduction Rates With a Normal Response to Testicular Injury
PEBP testis
2008/12/24
Raf kinase inhibitor protein-1 (RKIP-1) belongs to the phosphatidyl ethanolamine–binding family of proteins (PEBP), which are highly conserved throughout evolution and widely expressed in tissues...
Ram Sperm Selection by a Dextran/Swim-Up Procedure Increases Fertilization Rates Following Intrauterine Insemination in Superovulated Ewes
Sperm quality reproductive efficiency IUI
2008/12/22
The objective of this study was to compare the efficacy of 2 dextran/swim-up media to increase the sperm quality parameters and the maintenance of these parameters at 15°C and 30°C over 6 hours. A...
Males With Subnormal Hypo-Osmotic Swelling Test Scores Have Lower Pregnancy Rates Than Those With Normal Scores When Ovulation Induction and Timed Intercourse Is Used as a Treatment for Mild Problems With Sperm Count, Motility, or Morphology
Hypo-osmotic swelling test male infertility timed vaginal intercourse
2008/12/22
This study was designed to evaluate the effectiveness and clinical usefulness of the hypo-osmotic swelling (HOS) test in predicting successful conception in couples in which men with mild male-fac...
The Ratio of Second to Fourth Digit Length in Azoospermic Males Undergoing Surgical Sperm Retrieval: Predictive Value for Sperm Retrieval and on Subsequent Fertilization and Pregnancy Rates in IVF/ICSI Cycles
Hox genes finger length azoospermia surgical sperm retrieval
2008/12/19
The differentiation of the urogenital system and the appendicular skeleton in vertebrates is under the control of Homeobox (Hox) genes. It has been shown that this common control of digit and gonad ...