Results 31 to 40 of about 1,250,028 (195)

Reproductive System Structure, Development and Function in Cephalopods with a New General Scale for Maturity Stages [PDF]

open access: yes, 1992
The main types of reproductive system structure, development and functions in cephalopods are described from personal observations and use of the literature. There is one type in males and three in females which are order specific.
Arkhipkin, A. I.
core   +1 more source

Prominin‐1 expression in the testis/epididymis and fertility

open access: yesReproductive Medicine and Biology, 2023
The contribution of Prominin‐1 (aka CD133) to male fertility has recently been (re)investigated, with contradictory results. Early findings, essential for deciphering its role, have unfortunately been neglected.
Christine A. Fargeas   +2 more
doaj   +1 more source

The roles of inter- and intra-sexual selection in behavioral isolation between native and invasive pupfishes [PDF]

open access: yes, 2017
Male-male competition and female mate choice may both play important roles in driving and maintaining reproductive isolation between species. When previously allopatric species come into secondary contact with each other due to introductions, they ...
Becher, Cory, Gumm, Jennifer M.
core   +2 more sources

Update on male reproductive endocrinology. [PDF]

open access: yes, 2018
Practitioners of male reproductive and sexual medicine must have an intimate understanding of the physiology of male reproductive endocrinology, as such a knowledge is the cornerstone on which hormonal treatments are based.
Clavijo, Raul, Hsiao, Wayland
core   +1 more source

Auto-spermatophore extrusion in male crickets [PDF]

open access: yes, 2003
The reproductive cycle of the male cricket consists of the mating stage and the sexually refractory stage. The latter is further divided into the first refractory stage (RS1) from spermatophore extrusion in copulation to spermatophore preparation after ...
Kumashiro, Mikihiko   +2 more
core   +1 more source

Flower Bud Differentiation, Mega-micro Spore Production, and Male-female Gametophyte Development in Camellia weiningensis

open access: yesJournal of the American Society for Horticultural Science, 2022
Camellia weiningensis is a typical woody edible oil tree species in the northwest alpine area of Guizhou Province, China, but its embryological development is not fully elucidated. Here, we assessed flower bud differentiation, microsporogenesis, and male-
Hongli Wei   +5 more
doaj   +1 more source

Litigating reproductive health rights in the inter-American system: what does a winning case look like? [PDF]

open access: yes, 2014
Remedies and reparation measures emerging from the Inter-American System of Human Rights in reproductive health cases have consistently highlighted the need to develop and subsequently implement, non-repetition remedies that protect, promote and fulfill ...
O'Connell, Ciara
core  

Mating system variation and assortative mating of sympatric bromeliads (Pitcairnia spp.) endemic to neotropical inselbergs [PDF]

open access: yes, 2015
Premise of the study: The mating system is an important component of the complex set of reproductive isolation barriers causing plant speciation.
Cozzolino, Salvatore   +4 more
core   +1 more source

Effectiveness of hesperidin on methotrexate-induced testicular toxicity in rats [PDF]

open access: yesKafkas Universitesi Veteriner Fakültesi Dergisi, 2017
The aim of this study was to investigate the effect of hesperidin on male reproductive system in rats to which methotrexate (MTX) was administered. In the study, 28 male Wistar albino rats at the age of 8 weeks and had 250-300 g of live weight were used.
Saadet BELHAN   +6 more
doaj   +1 more source

Silent Spring - the lost call [PDF]

open access: yes, 2008
The "silence" in Rachel Carson's Silent Spring1 alludes to the demise of bird populations through reproductive problems and death resulting from exposure to the pesticides of that time, many of which are endocrine active.
Mary Ann Ottinger, Michael J. Quinn
core   +1 more source

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