* During the last 3 weeks of gestation: lactose, potassium, citrate, phosphate, calcium, magnesium and protein increase.
* During the last 3 weeks of gestation: lactose, potassium, citrate, phosphate, calcium, magnesium and protein increase.
* In the '''Mare''', a measurement of '''calcium carbonate''' in mammary secretions can aid prediction of foaling onset. If >200ppm, 51% of late pregnant mares will foal in 24 hours and 97% in 72 hours. If <200ppm, 99% will not foal in the next 24 hours.
* In the '''Mare''', a measurement of '''calcium carbonate''' in mammary secretions can aid prediction of foaling onset. If >200ppm, 51% of late pregnant mares will foal in 24 hours and 97% in 72 hours. If <200ppm, 99% will not foal in the next 24 hours.