Oophorectomy is the surgical removal of the ovaries of a female animal. In the case of non-human animals, this is also called spaying. It is a form of sterilization.
The removal of the ovaries together with the Fallopian tubes is called salpingo-oophorectomy. Oophorectomy and salpingo-oophorectomy are not common forms of birth control in humans; more usual is tubal ligation, in which the Fallopian tubes are blocked but the ovaries remain intact.
In humans, oophorectomy is most usually performed together with a hysterectomy - the removal of the uterus. Its use in a hysterectomy when there are no other health problems is somewhat controversial.
In animals, spaying involves an invasive removal of the ovaries, but rarely has major complications; the superstition that it causes weight gain is not based on fact. Spaying is especially important for certain animals that require the ovum to be released at a certain interval (called estrus or "heat"), such as cats and dogs. If the cell is not released during these animal's heat, it can cause severe medical problems that can be averted by spaying or partnering the animal with a male.
Oophorectomy is sometimes referred to as castration, but that term is most often used to mean the removal of a male animal's testicles.
Railways:
total: 1,801 km
narrow gauge: 1,801 km 1.000-m gauge (148 km electrified) (2000),
operated by Keretapi Tanah Melayu Berhad (KTM Berhad or KTMB).
Highways:
total: 94,500 km
paved: 70,970 km (including 580 km of expressways)
unpaved: 23,530 km (1996 est.)
Waterways: 7,296 km (Peninsular Malaysia 3,209 km, Sabah 1,569 km, Sarawak 2,518 km)
Pipelines: crude oil 1,307 km; natural gas 379 km
Ports and harbors: Bintulu, Kota Kinabalu, Kuantan, Kuching, Kudat, Labuan, Lahad Datu, Lumut, Miri, Pasir Gudang, Penang, Port Dickson, Port Kelang, Sandakan, Sibu, Tanjung Berhala, Tanjung Kidurong, Tawau
Merchant marine:
total: 361 ships (1,000 GRT or over) totaling 5,000,706 GRT/7,393,915 DWT
ships by type: bulk 61, cargo 119, chemical tanker 34, container 55, liquified gas 19, livestock carrier 1, passenger 2, petroleum tanker 57, refrigerated cargo 1, roll-on/roll-off 6, specialized tanker 1, vehicle carrier 5 (1999 est.)
Airports: 115 (1999 est.)
Airports - with paved runways:
total: 32
over 3,047 m: 5
2,438 to 3,047 m: 4
1,524 to 2,437 m: 11
914 to 1,523 m: 6
under 914 m: 6 (1999 est.)
Airports - with unpaved runways:
total: 83
1,524 to 2,437 m: 1
914 to 1,523 m: 8
under 914 m: 74 (1999 est.)
Heliports: 1 (1999 est.)
See Kuala Lumpur, Kuala Lumpur Star Light Rail Transit, Kuala Lumpur Putra Light Rail Transit, Kuala Lumpur Monorail