I know the breeding date and the vet verified the pregnancy and gave and estimated date. I would think ~10 days would be the maximum. On heifers we synchronize estrus on and breed on one day , they will calve over a 2 week period [early to late]. Correspondingly, how long can a cow go past its due date?
Using logic, if the cycle of a cow in 21 days, and they can go 2 weeks early or 2 weeks late, then I would say about 10 days late. Anything after that COULD be an 10 day early bull bred. Or, you can use the "if it is good, it is AI, if its average, it is bull" theory.
Also Know, how long before calving will a heifer bag up? And unless she doesn't bag up until a couple hours before she's about to calve, because some cows are like that. Also, she can start bagging up as early as 8 weeks before actually calving. So basically, sometime before she calves and after she calves, her udder will bag up.
In this manner, do cows go past their due date?
“They usually go a few days past the due date and tend to be a little bigger,” Westphal explains. Actual due date can vary depending on gestation length of certain individuals. Some cows consistently tend to calve earlier or later than their projected due date.
How do I know when my cow is about to give birth?
Signs in the weeks leading up to calving include udder development, relaxation and swelling of the vulva (springing), and a thick mucus discharge from the vulva. Relaxation of the pelvic ligaments and strutting of the teats may be observed in some cows in the 24 hours leading up to labor.
Related Question Answers
What time of day do cows give birth?
When cattle were fed at 9:00 am, 57% of the calves were born during the day, vs 79% with feeding at 10:00 pm. In field trials by cattlemen utilizing night feeding when 35 cows and heifers were fed once daily between 5:00 pm and 7:00 pm, 74.5% of the calves were born between 5:00 am and 5:00 pm. How do you tell if a cow is having problems calving?
Beyond watching the clock, there are some signs to look for that a cow and calf need some assistance, Grotelueschen says. “If the legs present normally and the calf's nose is there, and the calf's tongue or nose starts to swell, that's an indication of delayed progress.” Do cows give birth at night?
It has been suggested that night feeding causes intraruminal pressures to rise at night and decline in the daytime. In field trials by cattlemen utilizing night feeding when 35 cows and heifers were fed once daily between 5:00 pm and 7:00 pm, 74.5% of the calves were born between 5:00 am and 5:00 pm. Do heifers calve earlier than cows?
There are several factors known to affect the length of gestation in cattle. One of those is sex of the calf. On average, bull calves arrive later than heifer calves for cows bred on the same day. Some breeds and breed types are also known to have shorter or longer pregnancies than the overall average of 283 days. How long is a cow in labor?
Labor and delivery usually lasts less than 8 hours. Labor is divided into three stages with all three stages only lasting 6-12 hours. Cows and heifers can attempt to calve and fail in the time it takes us to perform our off farm job or other tasks around the farm. Do pregnant cows have discharge?
Unless a cow already has a uterine infection (such as following a difficult calving), this flushing gets rid of any contamination and the pregnancy can safely begin. The vaginal discharge after breeding is thus white or yellowish rather than clear. If it's clear, the cow may not have been bred. What was the longest pregnancy ever?
Hunter had been pregnant 375 days (instead of the normal 280) before her baby was born there last week; 375 days would be the longest pregnancy on record, topping the runner-up by about 58 days. How long should you wait to pull a calf?
Re: Pulling calves - how long to wait Rule of thumb is 1/2 hour with a cow (AFTER the water has broken), and 1 hour or slightly more for a heifer. Heifers are "first timers" so it will take them a bit longer. Cows should already know what is going on, and have a larger pelvic area, etc. Do cows calf standing up?
Some cows may stand with their tail raised, even though calving hasn't started. The second stage of labour is delivery. The cow will often lie down to give birth. The “water bag” or amnion then appears, often containing the calf's front legs. What is the longest gestation period for a cow?
There are 75 cases, or 2.7 per cent, that are for 290 days, or longer, with 296 days as the longest gestation period observed. How long after a cows water breaks should she calve?
A generally accepted length for stage two is two to four hours from when the first water bag appears or breaks; for cows, usually less than two hours; for heifers, less than four hours. Can a cow deliver a dead calf?
The normal abortion or stillbirth rate in a cow herd is 1 to 2 percent. Abortions can be a major concern for cattle producers. A stillbirth is when a full-term calf is born dead, with no obvious evidence of the cause of death. What is the difference between a cow and a heifer?
As we mentioned above, a cow is a female animal that has had at least one calf. Using everyday human-terms, cows are “moms.” A heifer is a female animal that has never had a calf. Once a heifer has a calf, she automatically becomes a cow. Can you breed a bull with his daughters?
Also, when relatives are mated, recessive genes that can cause death or deformity to the calf are often expressed. But inbreeding is not simply a "yes/no" concept. The most common parent-offspring mating is the breeding of a bull to his own daughters. Do cows feel pain during birth?
Researchers discovered that the level of pain at delivery and not the mode of delivery is the major risk factor for long-term pain and depression in women2. The parturition process and pathways of pain in cows are no different from those in humans. Why do cows stare at you?
Stilting, high-stepping walk, still staring at you in the same manner as previously mentioned means the animal is alert and on the verge of flight because of fear. Because cattle are prey animals, flight and keeping with the herd is their best (but not the only) defense mechanism against the offending stimulus. Do cows make noise during birth?
Cows and calves make noises to communicate with each other and locate each other. A few days before a cow gives birth she will regularly make little grunting noises that are heard by her unborn calf. Each calf recognizes the sound of its own mother. 
