The South Asian river dolphin (Platanista gangetica) is a freshwater or river dolphin found in India, Bangladesh, Nepal and Pakistan which is split into two subspecies, the Ganges river dolphin (P. g. gangetica) and Indus river dolphin (P. g. minor).he South Asian river dolphins are native to the freshwater river systems located in Nepal, India, Bangladesh, and Pakistan. They can be most commonly found in water with high abundance of prey and reduced flow.
Female dogs have their first estrus cycle -- known as coming on heat or being in season -- at around 6 to 7 months, though it can be as early as 4 months or as late as 2 years in some breeds and individuals. From then on, most bitches come on heat twice a year. During estrus, female dogs have a blood-stained discharge. Pro-Estrus Bleeding The first stage of estrus is pro-estrus, lasting 4 to 15 days, and a hormone called estrogen is produced causing changes in the bitches' wombs and vaginas in preparation for mating.
A normal heat cycle lasts approximately three weeks. In the beginning stages, known as proestrus, a bitch's vulva begins to swell, and you may notice her licking herself more than usual. Male dogs will also begin sniffing her more as her hormones begin to produce a scent that signals she is becoming ready to breed.