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| * Secretions from the female reproductive tract that serve to sexually stimulate and attract males to the female. | | * Secretions from the female reproductive tract that serve to sexually stimulate and attract males to the female. |
| * Vaginal and urinary secretions from females in '''Oestrus''' smell different to the male then secretions of females not in Oestrus. | | * Vaginal and urinary secretions from females in '''Oestrus''' smell different to the male then secretions of females not in Oestrus. |
− | * Pheramone is a volatile substance released to the outside of the body and perceived by the olfactory system and/or activated by the vomeronasal organ. Releasing pheramones can cause specific behaviour in the recipient. | + | * Pheramone is a volatile substance released to the outside of the body and perceived by the olfactory system and/or activated by the '''vomeronasal organ'''. Releasing pheramones can cause specific behaviour in the recipient. |
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| * Males also produce sex pheramones. | | * Males also produce sex pheramones. |
− | ** Boars produce specific substances that cause sows and guilts to become sexually aroused when they are in '''oestrus'''. | + | ** '''Boars''' produce specific substances that cause sows and guilts to become sexually aroused when they are in '''oestrus'''. |
| ** Two sexual attractants are produced by boars: | | ** Two sexual attractants are produced by boars: |
− | *** Preputial pouch secretion | + | *** '''Preputial pouch secretion''' |
− | *** Pheramonal substance in saliva secreted by the submaxillary salivary gland. | + | *** '''Pheramonal substance in saliva''' secreted by the submaxillary salivary gland. |
− | **** During sexual excitement, the boar produces copious quantities of foamy saliva. The active components in saliva are the androgen metabolites 3 | + | **** During sexual excitement, the boar produces copious quantities of foamy saliva. The active components in saliva are the androgen metabolites '''3α-Androstenol''' and '''5α-Androstenone'''. Both have a musk-like odour. |