Though they measure the same genital process of vasocongestion, vaginal photoplethysmography and penile plethysmography use different physiological endpoints to estimate sexual response; vaginal photoplethysmography uses light reflectance to assess color change in the vaginal epithelium, whereas penile plethysmography assesses changes in the size of the penis.
Out of 352 genital specimens processed, 29 clinical strains of N. gonorrhoeae were identified.
Due to globalized migratory processes, female genital mutilation/cutting (FGM/C) has spread to other countries, including countries in Europe, where, with a few exceptions, it remains a concealed problem.
In particular, a focus on divergence in baculum morphology between closely related species or diverging populations is likely to advance understanding of genital evolution and speciation processes, as is increasingly being recognised in arthropod taxa [ 41, 42].
Under normal conditions, sperm capacitation take place in the female genital tract, however, the process can be mimicked in vitro by incubating epididymal or ejaculated sperm in a defined medium [18] [21], and a protein source that usually is bovine serum albumin (BSA) which approximates that of oviduct fluid is essential for sperm capacitation [43].
They acquire this ability during their transit through the female genital tract in a process known as capacitation, where they undergo a large number of membrane and metabolic modifications such as an increase in intracellular ions and protein tyrosine phosphorylation, generation of reactive oxygen species and changes in metabolism, motility and plasma membrane fluidity [1] [5].
The PGCs migrate from the yolk sac along the hindgut toward the genital ridges in a process controlled by mast/stem cell growth factor receptor Kit (KIT) and its ligand, Kit ligand (KITLG) (58, 61).
Neurovascular processes that mediate genital vasocongestion are impaired in diabetes (8).
Thus, the joint study of intraspecific variation and interspecific divergence may provide a useful approach for the understanding of the underlying genetic architecture of genital traits and the evolutionary processes involved [ 13- 15].
In addition, antiretrovirals such as tenofovir need to enter target cells present in the sub-epithelial layers, thus leaving the lumen of the female genital tract, where the infection process commences, potentially unprotected.
