The core difference: more care

The simplest way to understand a twin pregnancy is that it comes with more care built in. A twin or multiple pregnancy needs more antenatal attention than a singleton, which means additional health checks and more ultrasounds across the months (Pregnancy, Birth and Baby). If your appointment schedule looks busier than a friend's singleton pregnancy, that is expected, not a warning sign.

That extra monitoring is the thread running through everything below. It exists so your care team can see how both babies are growing and step in early if anything needs attention.

Why the closer watch

Twin and multiple pregnancies carry a higher chance of certain complications than singleton pregnancies, and knowing them up front is the point of the extra checks, not a reason to worry. The conditions your team keeps an eye on include anaemia, gestational diabetes, high blood pressure and pre-eclampsia, premature birth, low birthweight, and babies lying in an awkward position, known as malpresentation (Pregnancy, Birth and Baby; AMBA).

None of these is a certainty, and many twin pregnancies pass without them. The reason they are listed is practical: the more often your care team looks, the earlier any of them can be picked up and managed. That is the whole logic of the fuller schedule.

Chorionicity, in plain terms

Early on you may hear the word chorionicity. In plain terms it describes whether your twins share a placenta or each have their own. It matters because twins who share a placenta are watched more closely, and that is one of the reasons twin pregnancies tend to involve early and repeated scans (Pregnancy, Birth and Baby).

Your care team will explain which arrangement applies to you and what it means for your appointments. It is a detail worth understanding, but it is theirs to interpret, and the takeaway is simply that it shapes how often you will be seen.

A shorter run to full term

Twins also tend to arrive sooner. Full term for twins is generally considered around 37 to 38 weeks, earlier than for a singleton, and twins are more likely to be born early (AMBA; Pregnancy, Birth and Baby). Worth holding lightly: arriving early is not automatically the same as being premature. Premature means born before 37 weeks, so twins born at, say, 37 or 38 weeks are early relative to a singleton without being premature.

Your obstetrician or midwife is the person to talk through what full term looks like for your specific pregnancy. The general pattern is useful to know, but your care team's guidance is what counts.

One practical thing you can do early

Because twins often arrive earlier and cost more from the start, many parents get the nursery ready sooner and lean on pre-loved to kit out two without the bill doubling. Buying the clothes and gear second-hand is an easy way to be prepared well ahead of time, and affordably.

References

This is general information, not medical advice. Your obstetrician or midwife is the right guide to your own pregnancy.

• Pregnancy, Birth and Baby (Healthdirect), Twin pregnancy
• Australian Multiple Birth Association, Expecting multiples

Related reading

• Twin birth in Australia: what to expect
• How common are twins in Australia?
• The real cost of twins in Australia: the 5x problem