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Twitter Marketing hasn't been around forever, but it's certainly not new. In fact, a lot has changed in terms of Twitter Marketing over the last decade and a half and even more so over the last year and a half. If you're new to Twitter Marketing, then there is probably a good reason, since many of the 'oldies' have moved on quite a bit. For instance, many companies still offer paid advertising on Twitter, a practice that was once considered an optional extra to be had. Many have changed since its heyday at the end of the 2000s and early 2010s; for instance, you no longer can get very far by following just a handful of people. Now, you need to target your audience, and Twitter marketing experts recommend that you take advantage of Twitter's updated demographics, which allow you to target your market based on location and language. As a result, you no longer need a large number of followers in order to gain influence on Twitter; a number of influential people are...

Artificial insemination ( AI ) is the deliberate introduction of sperm into a female's cervix or uterine cavity for the purpose of achieving a pregnancy through in vivo fertilization by means other than sexual intercourse. It is a fertility treatment for humans, and is common practice in animal breeding, including dairy cattle (see Frozen bovine semen) and pigs. Artificial insemination may employ assisted reproductive technology, sperm donation and animal husbandry techniques. Artificial insemination techniques available include intracervical insemination and intrauterine insemination. The beneficiaries of artificial insemination are women who desire to give birth to their own child who may be single, women who are in a lesbian relationship or women who are in a heterosexual relationship but with a male partner who is infertile or who has a physical impairment which prevents full intercourse from taking place. Intracervical insemination (ICI) is the easiest and most common insemin...

This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources:  "Artificial insemination" – news  · newspapers  · books  · scholar  · JSTOR ( September 2017 ) (Learn how and when to remove this template message) History edit The first recorded case of artificial insemination was John Hunter in 1790, who helped impregnate a linen draper's wife. The first reported case of artificial insemination by donor occurred in 1884: Dr. William H. Pancoast, a professor in Philadelphia, took sperm from his "best looking" student to inseminate an anesthetized woman. The case was reported 25 years later in a medical journal. The sperm bank was developed in Iowa starting in the 1950s in research conducted by University of Iowa medical school researchers Jerome Sherman and Raymond Bunge. In the United Kingdom, the British obstetrician Mary ...

AI is used for pets, livestock, endangered species, and animals in zoos or marine parks difficult to transport. Reasons and techniques edit It may be used for many reasons, including to allow a male to inseminate a much larger number of females, to allow the use of genetic material from males separated by distance or time, to overcome physical breeding difficulties, to control the paternity of offspring, to synchronize births, to avoid injury incurred during natural mating, and to avoid the need to keep a male at all (such as for small numbers of females or in species whose fertile males may be difficult to manage). Semen is collected, extended, then cooled or frozen. It can be used on-site or shipped to the female's location. If frozen, the small plastic tube holding the semen is referred to as a straw . To allow the sperm to remain viable during the time before and after it is frozen, the semen is mixed with a solution containing glycerol or other cryoprotectants. An extender is...