Short answer: Yes
But the real answer is that conception can occur at any time there is a fertile egg and live sperm present at the same time. And many things cause ovulation to occur at irregular times of a month. So the likelyhood or 'odds' that you get pregnant after 25 days is usually lower than say 14 days, but they are still there and there is still a chance.
The only way to be 100% sure is to avoid sex.
said in another way, even if you were on the 'pill', used a condom, and a spermicide, all on the same encounter, you would still have a chance of pregnancy.
No. Doctors (and other medical professionals) measure pregnancy in terms of LMP. If you are 7 1/2 weeks pregnant according to your doctor, you probably became pregnant about 5 weeks ago. This assumes you have the standard 28 day cycle, and became pregnant at mid cycle. LMP is not an accurate way to date a pregnancy. If you are in doubt, an ultrasound before the 18th week LMP is the most effective way to date your pregnancy.
hCG - Human Chorionic Gonadotropin which can be detected in a blood test 3 weeks after the LMP and in urine about 5 days later.
== == hCG levels in weeks from LMP (gestational age)* : * 3 weeks LMP: 5 - 50 mIU/ml * 4 weeks LMP: 5 - 426 mIU/ml * 5 weeks LMP: 18 - 7,340 mIU/ml * 6 weeks LMP: 1,080 - 56,500 mIU/ml * 7 - 8 weeks LMP: 7, 650 - 229,000 mIU/ml * 9 - 12 weeks LMP: 25,700 - 288,000 mIU/ml * 13 - 16 weeks LMP: 13,300 - 254,000 mIU/ml * 17 - 24 weeks LMP: 4,060 - 165,400 mIU/ml * 25 - 40 weeks LMP: 3,640 - 117,000 mIU/ml * Non-pregnant females:
ask your doctor
They consider your LMP (Last Monthly Period) to be the starting day of your last period, they track the 40 weeks of pregnancy from that, but no, it's not the actually day where you ovulated and got pregnant. You usually ovulate about 2 weeks AFTER your LMP so technically when you are "4 weeks pregnant" the baby is only 2 weeks.
just add the days from your LMP to the current date. then round it up to weeks and days
hCG levels in weeks from LMP (gestational age)* : 3 weeks LMP: 5 - 50 mIU/ml 4 weeks LMP: 5 - 426 mIU/ml 5 weeks LMP: 18 - 7,340...
Usually the doctors say the age is LMP. So if they say 15 weeks, it'd be about 13 weeks since conception.
ALL YOU HAVE TO DO IS FIGURE OUT THE FIRST DAY OF YOUR LMP (LAST MENSTRUAL PERIOD) AND THEN ADD 228 DAYS AND YOU SHOULD HAVE YOUR EDD.
You get an ultrasound and have them date the pregnancy that way.
Any counting of days regarding menstruation or fertility is always from the first day of your period - LMP is the day you started your last period, fertility window is from LMP - to days 9 thru 16 - the average cycle is 28 to 34 days beginning with LMP.
Pregnancies are always measured from your lmp so it sounds as if your ultrasound is spot on. They don't add 14 days or anything but it will be 8 weeks 5 days since you conceived