#cow-gestation-calculator {
max-width: 600px;
margin: 20px auto;
padding: 15px;
background: #fff;
border-radius: 5px;
box-shadow: 0 1px 3px rgba(0,0,0,0.1);
font-family: -apple-system, BlinkMacSystemFont, ‘Arial’, sans-serif;
color: #333;
box-sizing: border-box;
}
h2 {
text-align: center;
margin: 0 0 15px;
font-size: 1.4rem;
line-height: 1.2;
color: #333;
}
p {
text-align: center;
color: #666;
font-size: 14px;
margin-bottom: 15px;
}
.form-group {
margin-bottom: 15px;
position: relative;
}
label {
display: block;
margin-bottom: 5px;
font-size: 0.9rem;
font-weight: 600;
}
input[type=”date”], input[type=”number”] {
width: 100%;
padding: 8px;
border: 1px solid #ddd;
border-radius: 3px;
font-size: 0.9rem;
box-sizing: border-box;
}
input:focus {
border-color: #0073aa;
outline: none;
}
.tooltip {
position: relative;
display: inline-block;
margin-left: 5px;
}
.tooltip .tooltip-text {
visibility: hidden;
width: 180px;
background: #333;
color: #fff;
text-align: center;
border-radius: 3px;
padding: 5px;
position: absolute;
z-index: 10;
bottom: 125%;
left: 50%;
transform: translateX(-50%);
opacity: 0;
transition: opacity 0.3s;
font-size: 0.75rem;
}
.tooltip:hover .tooltip-text {
visibility: visible;
opacity: 1;
}
.button-group {
display: flex;
gap: 10px;
justify-content: center;
margin-top: 15px;
}
button {
padding: 8px 16px;
border: none;
border-radius: 3px;
cursor: pointer;
font-size: 0.9rem;
background: #0073aa;
color: #fff;
}
button:hover {
background: #005177;
}
#reset-btn {
background: #6c757d;
}
#reset-btn:hover {
background: #5a6268;
}
#copy-btn {
background: #28a745;
}
#copy-btn:hover {
background: #218838;
}
#result {
margin-top: 15px;
padding: 10px;
border-radius: 3px;
font-size: 0.9rem;
line-height: 1.4;
min-height: 20px;
}
#result.success {
background: #e6f4ea;
border: 1px solid #28a745;
}
#result.error {
background: #f8d7da;
border: 1px solid #dc3545;
}
.progress-bar {
width: 100%;
background: #f0f0f0;
border-radius: 3px;
height: 20px;
margin-top: 10px;
overflow: hidden;
}
.progress-bar-fill {
height: 100%;
background: #28a745;
transition: width 0.3s ease;
}
.timeline {
margin-top: 10px;
font-size: 0.85rem;
}
.timeline div {
margin: 5px 0;
}
noscript {
display: block;
color: #dc3545;
text-align: center;
margin-top: 10px;
font-size: 0.9rem;
}
@media (max-width: 600px) {
#cow-gestation-calculator {
margin: 10px;
padding: 10px;
}
h2 {
font-size: 1.2rem;
}
.button-group {
flex-direction: column;
}
button {
width: 100%;
}
}
`;
resultDiv.innerHTML = `
Estimated Calving Date: ${formatDate(dueDate)}
Possible Calving Range: ${formatDate(minDueDate)} to ${formatDate(maxDueDate)}
Current Stage: ${daysElapsed >= 0 ? trimester : ‘Pregnancy not yet started.’}
Progress:
Pregnancy Timeline: ${timeline}
Care Tips:
Enhanced Cow Gestation Calculator
Estimate your cow’s calving date and track pregnancy stages.
Enter the breeding date, then click “Calculate”.
JavaScript is disabled. Please enable it to use the calculator.
(function() {
if (!document.getElementById(‘cow-gestation-calculator’)) return;
const form = document.getElementById(‘calc-form’);
const breedingDateInput = document.getElementById(‘breeding-date’);
const gestationPeriodInput = document.getElementById(‘gestation-period’);
const resultDiv = document.getElementById(‘result’);
function formatDate(date) {
return date.toLocaleDateString(‘en-US’, {
weekday: ‘long’,
year: ‘numeric’,
month: ‘long’,
day: ‘numeric’
});
}
function calculate() {
resultDiv.className = ”;
resultDiv.innerHTML = ”;
try {
const breedingDateStr = breedingDateInput.value;
const gestationDays = parseInt(gestationPeriodInput.value);
if (!breedingDateStr) {
throw new Error(‘Breeding date is required.’);
}
if (isNaN(gestationDays) || gestationDays 292) {
throw new Error(‘Gestation period must be between 279 and 292 days.’);
}
const breedingDate = new Date(breedingDateStr);
if (isNaN(breedingDate.getTime())) {
throw new Error(‘Invalid breeding date.’);
}
const dueDate = new Date(breedingDate);
dueDate.setDate(breedingDate.getDate() + gestationDays);
const minDueDate = new Date(breedingDate);
minDueDate.setDate(breedingDate.getDate() + 279);
const maxDueDate = new Date(breedingDate);
maxDueDate.setDate(breedingDate.getDate() + 292);
const today = new Date();
const daysElapsed = Math.floor((today – breedingDate) / (1000 * 60 * 60 * 24));
const progressPercent = Math.min((daysElapsed / gestationDays) * 100, 100);
const trimester = daysElapsed <= 94 ? 'First (Days 1–94): Embryo development, minimal visible changes.' :
daysElapsed <= 188 ? 'Second (Days 95–188): Fetus grows, udder may begin to develop.' :
'Third (Days 189–283): Rapid fetal growth, udder enlargement, springing.';
const timeline = `
First Trimester (Days 1–94): Embryo implants, pregnancy confirmation via ultrasound (day 28–35).
Second Trimester (Days 95–188): Fetus grows to ~20–30 inches, cow’s appetite increases.
Third Trimester (Days 189–283): Calf reaches ~80–100 lbs, cow prepares for calving.
Possible Calving Range: ${formatDate(minDueDate)} to ${formatDate(maxDueDate)}
Current Stage: ${daysElapsed >= 0 ? trimester : ‘Pregnancy not yet started.’}
Progress:
Pregnancy Timeline: ${timeline}
Care Tips:
- Increase feed quality in the third trimester (e.g., higher protein grain).
- Monitor for signs of distress; consult a vet for pregnancy checks (day 30–60).
- Prepare a clean, dry calving area by day 260.
- Ensure adequate calcium to prevent milk fever post-calving.