The term BA15 means Bayonet base with 15mm in diameter. A BA15 bulb is commonly known by industry standards as the following bulb size: 1156 7506 7527 1157 2057 2357 7528 P21W P21/4W, etc. These BA15 bulbs are commonly use for turn signal, tail/stop lights, reverse lights and daytime running lights.
Depending on the breed of the heifer, most heifers will start to show the first signs of heat when they are between 9 and 22 months of age. 1  The rate of sexual maturity or puberty is determinate of genes and breeding. A deep, long, and wide rump is a very good sign that that heifer is a keeper. 2  You will always know when a heifer or cow is ready to be bred when they go into heat. 3  Normal estrus periods last 24 hours and occur between 17 to 24 days.
If you have 10 calves born from sexed semen, there is only a 39% chance that 9 of them are heifers and 1 is a bull calf, as you would expect. There is a 35% chance all 10 calves are heifer calves and a 19% chance you will get 8 heifer calves.mong the 14 herds that used â¥ 50 doses of sexed semen in heifers, conception risks were 47% Â± 3.2% (range 33 to 68%). Ten of these herds reported the use of â¥ 50 doses of conventional semen in heifers and had conception risks of 43% Â± 3.6% (range 29 to 61%).