A last-born enjoys being dependent on someone else, but also tends to be less organised.

These differences make complete sense within a relationship: the first-born ideally wants someone he/she can love and nurture, and the last-born wants someone to look after him or her.

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Among the most difficult partnerships are those between two first-borns.

If you’re both highly competitive, conflict is very likely when both of you want to be in charge.

Which means that knowing your ­lover’s position in a family will definitely help predict how difficult or easy it will be to get along...

The maxim that ‘opposites attract’ makes a good starting-point, because first-borns often make a good match with a last-born.

Not only that, but the youngest in a family is usually more fun-loving than the eldest, who can do with having a bit more lightness in his/her life.

Meanwhile, the last-born’s rebelliousness will delight many rule-abiding first-borns, who often vicariously enjoy their partner’s risk-taking behaviour.

A ­person’s character will also be affected by other events in early life - such as parents divorcing, or if there was wider abuse in the house, or constantly moving home.

What looking at birth positions will do is help you negotiate the minefield of potential influences on character by ­giving you the likely characteristics of any potential partner.

First-born Brad Pitt and last-born Angelina Jolie show complement each other However, there’s another far quicker way to find out whether your match is made in heaven. Each of these birth-order positions has specific characteristics.