Ancient Egyptian documents dating back to 1850 B.C. describe how
pessaries --objects or concoctions inserted into the vagina to block
sperm-- made of crocodile dung, honey, and sodium carbonate were common
contraceptive methods. Crocodile dung is actually slightly alkaline,
like modern-day spermicides, so it might have worked
2. Weasel's Testicles

Medieval cultures had some creative ways to stave off babies, like tying a weasel's testicles around their inner
thighs. According to the myth, if one takes the two testicles of a weasel and wraps them up, binding them to the
thigh of a woman who also wears a weasel bone, she will no longer be
able to conceive. Obviously, the method is nonsense.
3. Mercury

More dangerous contraceptive practices included the drinking of lead and
mercury by Chinese women thousands of years ago. This deadly potion was
used by concubines in ancient China in order to remain sterile. These
substances are known to cause things like kidney failure, brain damage
and, of course, death.
4. Brewed Tea With Beaver Testicles

This practice dates back to the 16th century
in Canada,
when women sought to prevent conception by soaking dried beaver
testicles in a concentrated solution of alcohol and then deeply drinking
the resulting infuse. There is no
record of its effectiveness.
5. Animal Intestines

One of the oldest known condoms is made from a pig's intestine. There's
even a user manual that suggests soaking it in warm milk before use to
make it softer and more supple.
Some historians claim that the first
illustration
of a man wearing a condom during sexual intercourse was King Minos of
Crete, son of Zeus and Europa, who lived around 3000 B.C.E. According to
the legend, a curse caused Minos' semen to contain serpents and
scorpions. To protect his sexual partner from these animals, Minos used a
goat's bladder as a condom. Another illustration from Ancient Egypt, about 3000 years old, seems to show a man wearing what looks like a sheath around his penis.
The oldest condoms ever found date back to 1642 and were animal-tissue sheaths, like sausage
casings, found at Dudley Castle in England.
6. Blacksmith Water

According to Soranus, a Greek gynecologist practicing during the 2nd
century A.D., women were told to drink the water that blacksmiths used
to cool metal as a birth control method.
Despite the fact that
it's not really understood why someone believed this, women were
volunteering to work in factories with lead just so it would keep them
sterile, even during the
First World War. The practice could lead to neurological problems, kidney failure, seizures, coma, and even death.
7. Opium Diaphragm

Ancient Sumatran women used the pod of this plant like a diaphragm during intercourse.
8. An Acacia, Date, and Honey Tampon

One of the first-ever written prescriptions for a contraceptive device
is a 1550 B.C. papyrus sheet from Egypt, which describes a tampon made
of seed wool moistened with ground acacia, dates, and honey.
Despite
its primitive nature, the tampon worked because acacia ferments into
lactic acid, an ingredient used in today's spermicides.
9. Cola and Other Carbonated Drinks

Coca-
Cola douches had become a
part of contraceptive tradition during the 1950s and 1960s, when other
birth control methods were hard to come by. The idea that Coca Cola can
be used as a spermicide was the big sensation of the Ig Nobel awards
ceremony held at Harvard in October 2008. The experiment was conducted
at Harvard Medical School's birth control laboratory. Scientists
Anderson, Hill, and Umpierre mixed four different types of Coke with
sperm to see whether the idea of the drink's contraceptive qualities is
true. During the laboratory experiments, scientists discovered that
Diet
Coke killed all sperm within one minute, but 41% were still swimming in
the recently introduced New Coke. Anderson told New Scientist magazine,
“It was believed that the carbonic acid in Coke killed sperm – and the
method came with its own 'shake and shoot' applicator.” However, other
researchers were unable to verify these results in later experiments.
10. Lemon Diaphragm

An oddity worth mentioning is that lemons were used in the 1700's as a
reasonably effective birth control metod. The shape would act as a
diaphragm and the acid in the citrus would kill the sperm. However,
lemon juice can damage vaginal tissue, so lemons are probably not a clever choice.