Reasons for miscarriage
Miscarriage isn't fully understood and some miscarriages just happen without explanation other than nature 'taking a hand' and expelling an embryo that is less than perfect.
Other possibilities include:
Blighted ovum - when a fertilised egg doesn't develop as it should.
Hydatidiform mole - this isn't a real pregnancy, as there's no fertilised egg. Instead, the body responds with pregnancy hormones to the development of collection of fluid-filled sacs growing from tissue that would have become the placenta if the pregnancy had been successful. An operation may be needed to remove the mole, but hormonal treatment is also available.
Problems with the cervix - the cervix starts to open, and the uterus contracts, pushing the baby out too soon, often before the 20 weeks.
Ectopic pregnancy - the embryo is developing in one of the fallopian tubes.

The most common time for something to go wrong with a pregnancy is in the first days and weeks after conception, when some abort.
It's thought that many early miscarriages go undetected. If your period arrives as normal you may never even suspect you were pregnant.
About one in six affirmed pregnancies miscarries, usually before 12 weeks. Most women who have one miscarriage go on to have a normal, healthy pregnancy next time.
If you miscarry at home, you'll need to see your doctor and may also have to go to hospital. In some situations, you may need an operation called a dilatation and curettage to be sure your uterus is clear.

Stillbirth is the term used to describe when a baby dies, either in the metra or during labour, and is delivered on or after the 24th week of pregnancy. Although there's been a worrying grow in stillbirths since 2001, there's no one factor that accounts for this change, and health professionals have called for more research into the area.
The cause of many stillbirths is unclear, and while there's cumulative evidence of a strong link between stillbirth and poor growth in the metra, in 50 per cent of cases the reasons for death are unknown.
Where the cause of death is identified, the most common reason (15 per cent) is because of physical defects. Other possible causes include a birth trauma, for example the umbilical cord can become wrapped around a baby's neck, or there can be placental problems.
Stillbirths can occur unexpectedly in healthy pregnancies, but there are also several known risk factors, including:
multiple pregnancies
smoking during pregnancy
being over 35
pre-existing health problems, such as high blood pressure or diabetes

What to wear
Baggy tunic tops, sweaters and man-size T-shirts - can be worn until the end of your pregnancy if you get them large enough.
Tracksuit bottoms - if the style is suitable, you can replace the elastic waistband with drawstring to make the most of the width.
Comfy leggings and cycle shorts - they won't stretch to infinity, though, so you may need to buy maternity versions eventually.
Stretchy and comfortable underwear - bring out the granny pants, or wear smaller pants under your bump.
Maternity bras - get measured at about seven months.
Trousers can be fastened under your bump in the later months.
Floaty dresses - those that flare out from under the bust. Make sure they're long, though, or you'll find the front hemline rises higher than the back.
Lace-up shoes - to allow for minor swelling due to fluid retention.

Even before you get a proper 'bump' you may find your waist thickens, making it hard to fit into your tightest clothes.
You may be able to adapt your clothes for a while - leaving the top button undone on trousers might be enough, and you can hide the gap with a longer top.
Lots of today's maternity clothes can be worn after pregnancy, too, and some styles of normal clothes are well suited to covering growing bumps. You could also borrow some bigger items from friends or family.
It's difficult to predict how big you'll get; even previous pregnancies can only give a rough guide. This makes it hard to buy in advance of actual need. But however large you become, you'll certainly start needing something more 'roomy' from six months. And remember that clothes with the most 'space' will give you the most wear.