Effect of corpora lutea grafted under renal capsule on pregnancy in the rabbit.

Implantation of the blastocyst and maintenance of pregnancy were examined by autografting corpora lutea under renal capsule in rabbits. Implantation of the blastocyst did not occur when the corpora lutea were autografted because of small amounts of lutein tissue, low secretory activity of lutein cells, and the period required for functional activity of grafts. Autografts of 4-day-old corpora lutea were capable of maintaining pregnancy after 15 days post coitum, when follicles and interstitial tissue remained intact.

Ultrastructure of testes and excurrent ducts in the bonnet monkey (Macaca radiata).

The testes and excurrent ducts of four bonnet macaques (Macaca radiata) were examined using scanning and transmission electron microscopy. The three layers of contractile and connective tissue composing the tunica albuginea, and the multilayered tunica propria of the seminiferous tubules were similar to that of man. Spermatids project from the epithelium or are found free in the lumen.

Scanning electron microscopy of baboon spermatozoa.

Ejaculated baboon sperm was observed by scanning electron microscopy. The plasma membrane was generally smooth except on the acrosome where it was probably slightly wrinkled. The head was short, oval, paddle-shaped and tapering at its anterior end.

Effect of photoperiod on gonadotropin releasing hormone-induced LH release in the immature rat.

Female rats raised from birth under a light/dark (LD) or constant light (LL) regimen were given injections at either 24, 29, 33 or 35 days of age of either 5 IU PMSG or 0.1 ml saline. Two days following PMSG or saline injection, the rats were given injections of either 1,000 ng synthetic gonadotropin releasing hormone (GnRH) or 0.

Spermiation and epididymal maturation of spermatozoa in the bonnet macaque (Macaca radiata) as viewed by scanning electron microscopy.

Spermiation and epididymal maturation of spermatozoa were studied in the bonnet monkey (Macaca radiata) by light and scanning electron microscopy. The morphology, location, and release of residual body were observed during spermiation. Along the epididymal duct, the shape of spermatozoa changed, the constriction at the anulus disappeared, the marginal thickening diminished in length, and the cytoplasmic droplet regressed and moved toward the posterior end of the middle piece.

Candida albicans in women.

Ninety-two pregnant and nonpregnant patients were randomly selected from two obstetric-gynecologic clinics for the purpose of investigating factors that affect the incidence and severity of vaginal candidiasis. Six factors were found to be significantly associated with the incidence of Candida albicans: drug addiction, obesity, birth control pills, pregnancy, antibiotic therapy, and diabetes mellitus.

Human endometrial fluid kinetics as observed by scanning electron microscopy.

Segments of human endometrium, obtained during different stages of the menstrual cycle, were fixed in glutaraldehyde, processed by critical point drying, coated with carbon and gold, than observed with a scanning electron microscope under magnifications varying from 20 to 200,000. The endometrium was basically made of two different types of cells: secretory nonciliated cells and ciliated cells. Different types of secretory cells at different stages of secretory cycles were observed.

Rapid transport of alien eggs transplanted 66 hours post coitum in the oviduct of the rabbit.

Alien (fixed and stained) rabbit ova were transferred into the oviduct of recipient rabbits 24, 48, 60, and 66 hours post-coitum and were observed at 48, 72, 72, and 72 hours post-coitum respectively, using a clearing technique. In all cases the transport of alien eggs was accelerated, so they caught up with native eggs. Alien eggs, transferred to the ampulla 66 hours post-coitum were transported to the uterus within six hours.

Histomorphology of cervical and uterine epithelia of crab-eating macaque, Macaca fasciularis.

Cytological characteristics and pattern of distribution of different cell types in the epithelia of cervix and uterus of crab-eating macaque (Macaca fascicularis) in follicular and luteal phases of the menstrual cyclic and amenorrhea were studied. The cervix uteri and uterus exhibit remarkable structural differenes in the ciliated, secretory, and ciliated-secretory cells. Since the number of ciliated-sexretory cells in the uterus is higher than in the cervix.

Maternal malnutrition, low birthweight and related phenomena in man. Physiological and behavioral interactions.

The variables producing lowered birthweight include prematurity, maternal genetic tendencies, low prepregnancy weight, low weight gain during pregnancy, pathologies of pregnancy, multiple births, maternal malnutrition, and intrauterine growth retardation. Reductions in intelligence related to low birthweight are distributed equally among different socioeconomic groups. However, when mental subnormality is used as the criterion of impairment, low socioeconomic status is a better predictor of poor outcome than low birthweight.