It's a phenomenon known as parthenogenesis, or more colloquially as virgin birth. SARAH ZHANG: So these were two females who each had a son where there was no father.
Parthenogenesis (/ˌpɑːrθɪnoʊˈdʒɛnɪsɪs, -θɪnə-/; from the Greek παρθένος, parthénos, 'virgin' + γένεσις, génesis, 'creation') is a natural form of asexual reproduction in which growth and development of embryos occur in a gamete (egg or sperm) without combining with another gamete (e.g., egg and sperm fusing).
Yes, it is possible to get pregnant from pre-ejaculate fluid, or precum. This fluid is mostly a lubricant, but it can also transport sperm from the penis to the vagina.
IUI is the most successful type of artificial insemination and can be a great option for getting pregnant without a man. It's also a simple procedure that's less expensive than other fertility treatments.
Greenflies, stick insects, aphids, water fleas, scorpions, termites and honey bees are all capable of reproducing without males, using parthenogenesis.
Beavers mate at approximately three years old, and unless one of the partners dies, they stay together for life. Both parents take care of their offspring, which remain with them for two years. These animals can be found in a variety of bodies of water throughout the continental United States.
Probably not. Ethical considerations preclude definitive research on the subject, but it's safe to say that human DNA has become so different from that of other animals that interbreeding would likely be impossible.
If you have no sperm at all in the ejaculate and there does not appear to be a blockage or a brain issue, can you still get your partner pregnant? The answer is yes.
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.
What is “azoospermia”? Azoospermia is the medical term used when there are no sperm in the ejaculate. It can be “obstructive,” where there is a blockage preventing sperm from entering the ejaculate, or it can be “nonobstructive” when it is due to decreased sperm production by the testis.
Mammalian males, including humans, do not possess a uterus to gestate offspring.
A team of scientists has created synthetic human embryos from stem cells, without the need for either an egg or sperm — a remarkable breakthrough that raises plenty of thorny ethical questions.
While there is no definite age at which male ejaculation ceases, it has been suggested that it may happen when a man reaches his late 40s or early 50s. It is important to note, however, that this is not a universal rule and some men may continue to ejaculate at a later age.
sperm, also called spermatozoon, plural spermatozoa, male reproductive cell, produced by most animals.
Causes include physical problems, chemical imbalances and emotional/psychological factors. Treatments include learning techniques to delay ejaculation, counseling and medications.
Azoospermia is a condition in which there's no measurable sperm in a man's ejaculate (semen). Azoospermia leads to male infertility.
In fact, such human-animal hybrids are often referred to as “chimeras”.
The animal that has the most pleasure during mating or sexual intercourse is the Bonobo. It would be safe to say that Bonobos are the most sex-crazed animals that enjoy having sex to their fullest. Also, their sexual behavior and activities are insanely identical to humans.
LiveScience: The earliest known ancestors of modern humans might have reproduced with early chimpanzees to create a hybrid species, a new genetic analysis suggests. The earliest known ancestors of modern humans might have reproduced with early chimpanzees to create a hybrid species, a new genetic analysis suggests.
One animal that gives its partner and might die in the process is the Gibbon monkey. These primates are known for their strong social bonds and lifelong partnerships. When one of the partners dies, the surviving Gibbon monkey can become depressed, stop eating, and ultimately die from heartbreak.
Socially monogamous birds, such as most Australian cockatoos and parrots, pay meticulous attention to each other. They reaffirm bonds by preening, roosting and flying together in search of food and water.
A large-scale study found that human copulation lasts five minutes on average, although it may rarely last as long as 45 minutes. That's much shorter than the 12-hour mating roundsseen in marsupial mice, or the 15-minute couplings for orangutans, but longer than the chimpanzees' eight-second trysts.
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).
While aging influences a man's erectile function, many elderly men can still naturally produce healthy erections far beyond their prime. On the flip side, other factors may adversely affect your erection, such as weak pelvic floor muscles, certain medications, and spinal injuries.
There's no maximum age that stops a man from being able to have a baby. You can become a father long into your older years, but there are risks.