I found this on the web and thought I would post it (My staff were talking about what would I do if I had twins and I peed my pants a little.... reading this I think I'm pretty safe!)

1. Have a History
Do twins run in your family? If you have a mother, brother, sister, uncle or long lost cousin with multiples, you may wonder if you'll have them too. Sometimes twinning is hereditary, it's true. However, only fraternal (dizygotic twins are influenced by heredity, and then only in some cases. If your mother or maternal grandmother was or had fraternal twins, you might have inherited a gene for hyperovulation, increasing your chances of conceiving twins also.

2. Grow or Gain Weight
A recent study published by the American College of Obstetrics and Gynecology correlates the rise in multiple birth rates with rising rates of obesity. Research found that mothers with a BMI (Body Mass Index) of 30 or higer were significantly more likely to have twins. Again, this statistic only holds true for fraternal (dizygotic) twins. The research also showed that women of above-average height were also more likely to have multiples

3. Grow Up: Wait Until You're Older
Older mothers are more likely to conceive twins than their younger counterparts. It's thought that the body accelerates ovulation as the biological clock starts ticking faster. Seventeen percent of mothers over age 45 have multiples. Wait five more years and the odds rise to one in nine! However, the risks also increase; older mothers have a higher rate of miscarriage and are more likely to experience problems such as gestational diabetes during their pregnancy; in addition, their babies are at higher risk for chromosomal abnormalities.

4. Have More Twins
Once you have had a multiple pregnancy, you are significantly more likely to conceive -- and deliver -- twins again! Some estimates suggest that mothers of twins are four times more likely to have twins again than a woman who has never been pregnant, or who only had a singleton.

5. Diet: Yams & Dairy
No one is quite sure why, but the Yoruba tribe in West Africa has the highest rate of twinning in the world. A study concluded that the mother's diet was the cause, being high in cassava, a type of yam or sweet potato. The peelings of this vegetable are thought to contain a chemical that causes hyperovulation. In addition, a 2006 study found that women who consume dairy are five times as likely to have twins.

6. Seek Fertility Assistance
Reproductive technology has dramatically increased the multiple birth rate. Drugs that stimualate ovulation can lead to a multiple pregnancy, but multiples can also result from invitro fertilization. It's not just that multiple embryos are implanted in the mother, but there is also an unexplained increase in the number of monozygotic twins among IVF patients. No ethical doctor would provide treatment if it wasn't warranted, so fertility assistance should only be sought out when necessary.

7. Have A Big Family
The more kids you have, the more likely you are to conceive twins in a subsequent pregnancy. No one knows the magic limit that triggers a multiple pregnancy, so you'll just have to keep trying until it happens.

8. Conceive While Breastfeeding
Most people think that you can't get pregnant while breastfeeding, that the process of lactating keeps a woman from ovulating. However, plenty of mothers of twins can disprove that theory. Some research has supported the theory that the chance of twins or multiples is increased if a woman conceives while breastfeeding.

9. Get Pregnant On the Pill
Birth control pills are usually thought to be 99.9 percent effective at preventing pregnancy. However, that .01 percent often results in a double whammy -- multiples. Sometimes pregnancy occurs when the pill isn't taken consistently; in other cases, the hormonal mix of a particular drug type simply doesn't provide enough coverage to completely prevent ovulation. In either case, playing around with hormones can lead to hyperovulation, increasing the chances of multiples.

10. Just Get Lucky!
Many parents of multiples don't meet any of the classic criteria, yet find themselves doubly blessed. Monozygotic twins are particularly mysterious; no one is exactly certain what causes an egg to split after conception

well.... I can tick a few of the twin boxes!!!!! plus my husband is an identical twin!
I'd love to get two for the price of one!!!!

Thats awesome! My mom has twins on her side, my great grandma was a twin!! yay!! So we have a chance!! We have twins on mine and OH's side and that other stuff is helpful tips... maybe it will work!! Fingers crossed!

OH NO! I think I may be doomed... I have a maternal great aunt who had 17 kids... 3 sets of twins, and 1 set of triplets, the rest singles (I think). And I eat enough dairy and yams to feed an army. Roasted sweet potatoes... yuuummm.... and I got through anywhere from 3-5 gallons of milk per week, all on my own. And I LOOOOVE cheese!! And that's just the beginning...

ooooohhhh i hope so !!! one will be fab but two,ive always been besotted by twins uknow there so so cute !!!

Im going to start eating Yam Peels

My Brothers are twins. DH Auntie was supposed to be a twin as well the other baby was still born though.

i concieved twins naturally last time but had mc after 2 other mcs...lost them at ten weeks.. twins are all well and good ladies and hate to put a dampener on things-but they are also so much more complicated and more likely to have mc and complications!!!!

I would die for an uncomplicated singelton pregnancy!!!!!!!

I've got twins in my family every generation, am nearly 6 foot tall and i'm 30 so i tick lots of the boxes......eek! But that still only gives us a 4-5 times chance compared with others without that histroy who have a 1% chance....so that 5% at most so still tiddly chance! So with ttc i'm just hoping for one....

I tick a lot of those boxes too... eeep!

I posted this because I was trying to NOT have twins! Cute? Yeah. Twice the mess? Yup! I'm sure if I had twins they would plan in their own little twin mind readings to schedule it so at least one was awake all the time!
The only one I checked off was liking dairy (could live on feta!!!)