Sperm guidance information

Sperm guidance is the process by which sperm cells (spermatozoa) are directed to the oocyte (egg) for the aim of fertilization. In the case of marine invertebrates...

Sperm chemotaxis is a form of sperm guidance, in which sperm cells (spermatozoa) follow a concentration gradient of a chemoattractant secreted from the...

1–3 mm/minute in humans) by whipping in an elliptical cone. Sperm have an olfactory guidance mechanism, and after reaching the fallopian tubes, must undergo...

Sperm thermotaxis is a form of sperm guidance, in which sperm cells (spermatozoa) actively change their swimming direction according to a temperature...

Reversible inhibition of sperm under guidance (RISUG), formerly referred to as the synthetic polymer styrene maleic anhydride (SMA), is the development...

suggests that mammalian sperm employ thermotaxis to move to an appropriate location in the female's oviduct (see Sperm guidance). Poff and Skokut, Proceedings...

biochemist who specializes in the navigation mechanisms of bacterial and sperm cells. He is a professor emeritus at the Weizmann Institute of Science,...

tuberculate, low pH can damage the eggs chemical influence on sperm mobility and velocity. Sperm guidance Acrosome reaction Oocyte Wessel, GM; Brooks, JM; Green...

Robotic sperm (also called spermbots) are biohybrid microrobots consisting of sperm cells and artificial microstructures. Currently there are two types...

fertilisation (IVF) is a process of fertilisation where an egg is combined with sperm in vitro ("in glass"). The process involves monitoring and stimulating a...

California Cryobank is a sperm bank in California, United States, one of the two biggest in the world. There are offices in Palo Alto, Los Angeles, Cambridge...

gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm). It begins when a pollen grain adheres to the stigma of the carpel, the...

whilst carrying two non-motile sperm cells. Upon reaching the ovule, the pollen tube ruptures, thereby delivering the sperm cells to the female gametophyte...

porpoises, and all other whales possessing teeth, such as the beaked whales and sperm whales. 73 species of toothed whales are described. They are one of two...

since approximately 50% of males with Klinefelter syndrome can produce sperm. Some degree of language learning or reading impairment may be present,...

(Intracytoplasmic Sperm Injection) is performed by an embryologist whereby sperm is injected directly into the egg with a needle rather than allowing sperm to penetrate...

increased copper ions in the cervical mucus inhibit the sperm's motility and viability, preventing sperm from traveling through the cervical mucus, or destroying...

ranging from smaller fish and penguins to whale sharks, manta rays and sperm whales, as well as dolphins and other cetaceans that can be trained to perform...

excluded from receiving sperm donation." Therefore Japanese couples have to choose between "importing sperm from international sperm banks, which is expensive...

step-parent. The gametes of a parent result in a child, a male through the sperm, and a female through the ovum. Parents are first-degree relatives and have...

established through natural biological means, literally meaning born from sperm. This term contrasts with Naad Vansh, indicating a more conventional familial...

fertilization may instead be referred to as methods of oocyte selection or sperm selection, although the methods and aims partly overlap with PGD. In 1968...

long-acting reversible birth control. It primarily works by killing the sperm. The copper IUD came into medical use in the 1970s. It is on the World Health...

Hospital, Chelsea; the assisted zona hatching technique; intracytoplasmic sperm injection; Robert Winston, Baron Winston of Hammersmith Hospital. Directed...

data regarding the sperm content of pre-ejaculatory fluid. While some tentative research did not find sperm, one trial found sperm present in 10 out of...