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The end of the rejuvenation of the fertility schedule in Brazil: evidence from changes in contraception use and reproductive preferences among adolescents and young women
(Universidade Federal de Minas GeraisBrasilFCE - DEPARTAMENTO DE DEMOGRAFIAUFMG, 2018)
El embarazo. (1a. parte)
(Servicio Nacional de Aprendizaje (SENA)Subdirección Nacional de Operaciones. División Administración, Comercio y Servicios, 2016)
Time interval from ovulation to extrusion in female bullfrog in different photoperiods
(Sociedade Brasileira de Zootecnia, 2011-08-01)
It was analyzed in this work the influence of photoperiod on time interval from ovulation induction period to extrusion of ovocits in female bullfrogs (Lithobates catesbeianus). It was used 54 females reared from metamorphosis ...
Time interval from ovulation to extrusion in female bullfrog in different photoperiods
(Sociedade Brasileira de Zootecnia, 2011-08-01)
It was analyzed in this work the influence of photoperiod on time interval from ovulation induction period to extrusion of ovocits in female bullfrogs (Lithobates catesbeianus). It was used 54 females reared from metamorphosis ...
Fertility in Curitiba, Brazil: levels, trends and differentials
(DRUNPP-SARAJEVOSARAJEVO, 2012)
Objectives: To identify levels, tendency and recent differentials in fertility in Curitiba, Brazil. Methods: It is a quantitative and temporal series study, in which the birth rates, general and total fertility indicators, ...
The Epididymis as a Target for Toxicants
(2017-12-15)
The epididymis is the organ in which sperm mature by developing the capacity for progressive motion and fertilizing ability. There is evidence that sperm quality in humans and other animals has diminished, in parallel with ...
Are there costs in the repeated mating activities of female Southern stink bugs Nezara viridula?
(WILEY-BLACKWELL, 2011)
Mating is an energy demanding process, imposing risks to physical injuries, pathogen infection and predation. Nevertheless, repeated and multiple mating are widespread even in insect species where nuptial gifts are not ...
Decreased Implantation Number after in Utero Artificial Insemination Can Reflect an Impairment of Fertility in Adult Male Rats after Exogenous Leptin Exposure
(2017-02-01)
Leptin is a protein secreted by the adipocytes, which serves as a link between fat and brain. Its main action is to decrease appetite and increase energy expenditure, but it is also involved in the control of different ...
Maternal age influences on reproductive rates in Nile tilapia (Oreochromis niloticus)
(Revista Brasileira Zootecnia Brazilian Journal Animal Sci, 2015-04-01)
In this study we examined the effects of the maternal age on the fecundity (absolute and relative), egg production, and fertilization rates of Nile tilapia (Oreochromis niloticus). Females were divided into three groups: ...
Differential susceptibility to chromatid breaks induced by bleomycin in sub-fertile and fertile bovines
(Elsevier B.V., 2004-11-01)
The rate of chromatid breaks was studied in cows with a history of sub-fertility by means of a test based on measurement of the average of breaks induced in lymphocytes of peripheral blood cultures. Fourteen female specimens ...