Semen, also known as seminal fluid, is an organic bodily fluid created to contain spermatozoa.
The egg is among the largest cells in an organism, while the sperm (spermatozoon, plural spermatozoa) is often the smallest. The egg and the sperm are optimized in opposite ways for the propagation of the genes they carry.
There are two types of sperm cells: X sperm and Y sperm. X sperm: X sperm on combining with the X chromosome of the female produces a zygote with XX chromosomes.
Based on the chromosomal content, spermatozoa are of two types, that is, those bearing the X chromosome (X spermatozoa) and Y chromosome (Y spermatozoa) (Shettles, 1960; Gellatly, 2009).
It is quite normal for semen to form jelly-like globules and this does not indicate any health or fertility problem.
For many men, ejaculation is a sign of sexual pleasure and satisfaction. There is no definite age at which male ejaculation stops, but it has been suggested that it may occur when a man reaches his late 40s or early 50s. There are steps you can take to prevent premature ejaculation.
The structure, or morphology, of sperm are a third factor for conception. A normal sperm is shaped with an oval head and a long tail. These elements work together to propel the sperm forward to swim and find the egg located in the uterine tubes. Having more sperm with this shape increases the chance of fertility.
Sperm in the first fraction of ejaculate are more numerous, move more and present better quality DNA than those lagging behind.
In animals, female gametes are called ova or egg cells, and male gametes are called sperm. Ova and sperm are haploid cells, with each cell carrying only one copy of each chromosome.
Hint: Generally, two sperms do not fertilize the same egg. When one sperm comes in contact with the zona pellucida layer, there occur changes in the membrane, which prevent further entry of sperms. Two sperm fertilizing the same is very rare and occurs in very rare cases and embryos usually do not survive.
Sperm don't have brains. Brains are arrangements of multiple neurons (a type of cell) interacting with each other. A sperm is a single cell itself, with no neurons.
A spermatozoon (/spərˌmætəˈzoʊ. ən, ˌspɜːrmətə-/; also spelled spermatozoön; PL spermatozoa; from Ancient Greek σπέρμα (spérma) 'seed', and ζῷον (zôion) 'animal') is a motile sperm cell, or moving form of the haploid cell that is the male gamete. A spermatozoon joins an ovum to form a zygote.
Causes include physical problems, chemical imbalances and emotional/psychological factors. Treatments include learning techniques to delay ejaculation, counseling and medications.
Parthenogenesis is a Greek word meaning “virgin creation,” but specifically refers to female asexual reproduction.
Fertilization means the sperm has attached to and entered the egg.
The concentration of sperm is what makes the semen cloudy and thick, so if your ejaculate is watery it is possible that you have a low sperm count. This doesn't mean you're infertile (so precautions to prevent pregnancy still need to be taken for couples that don't want to get pregnant).
Ejaculatory anhedonia is the term used to describe the rare condition in which individuals are able to ejaculate physically but don't have the accompanying feelings of release, pleasure, or orgasm.
Some studies suggest that moderate ejaculation (2–4 times per week) is associated with a lower prostate cancer risk. However, ejaculating more often doesn't mean your cancer risk drops even more.
The next time you have sex, the number of sperms is not as much as the first time, but the quality of sperm remains stable, and that quantity is enough for fertilization to occur. This proves that having sex twice in a row is still possible to get pregnant if there is no reasonable protection.
Get enough folate and zinc
Limited studies suggest that consuming folate and zinc in combination may improve the overall health of sperm, including concentration and count.
A trained expert checks your sperm count, their shape, movement, and other characteristics. In general, if you have a higher number of normal-shaped sperm, it means you have higher fertility. But there are plenty of exceptions to this. A lot of guys with low sperm counts or abnormal semen are still fertile.
Age. As men get older, some find they take longer to get an erection, and erections are longer to maintain. Conversely, younger men might ejaculate sooner than they'd like (although that can happen at any age).
People who choose not to ejaculate are unlikely to experience harmful side effects. The body breaks down unused sperm, which does not build up to trigger further problems. Over time, not ejaculating can trigger psychological problems.
According to some studies, 18-year-old males have a refractory period of about 15 minutes, while those in their 70s take about 20 hours, with the average for all men being approximately half an hour. Although rarer, some males exhibit no refractory period or a refractory period lasting less than 10 seconds.