Genotype and Marriage: When and How to Have the Talk

Genotype compatibility is one of the most important — and most awkward — conversations for Nigerian couples planning a future. You've probably heard someone ask "What's your genotype?" half-jokingly on a first date. But for couples who want children, genotype genuinely matters, and knowing when and how to talk about it can protect your future family. Here's what AA, AS and SS mean, when to bring it up, where to test and how to have the talk kindly.

What is genotype?

In this context, your genotype describes the type of haemoglobin genes you carry. The common genotypes in Nigeria are:

• AA — no sickle cell trait
• AS — carries the sickle cell trait
• AC — carries the haemoglobin C trait
• SS — sickle cell disease
• SC — a form of sickle cell disease

People with AS or AC are usually healthy and often don't know they carry a trait until they're tested. That's exactly why testing matters.

Why genotype matters for couples planning children

A child inherits one of these genes from each parent. When both partners carry a sickle trait, there's a chance their child could have sickle cell disease.

For example, if both partners are AS, each pregnancy has a 1 in 4 chance of a child with sickle cell disease (SS), a 1 in 2 chance of a child who carries the trait (AS), and a 1 in 4 chance of a child who is AA. Those odds apply to each pregnancy separately — having one AA child doesn't change the odds for the next.

Other combinations where both partners carry a trait, such as AS with AC or AS with SS, also carry a risk. A doctor or genetic counsellor can explain exactly what your combination means.

Genotype and marriage: when to have the talk

Not on the first date (usually)

Asking a near-stranger their genotype on date one can feel like a medical interview, and it can make people feel judged. Unless you've both made it clear you're dating for marriage and you're both comfortable, it's usually better to wait a little.

Once things are getting serious

The best time is when you're both clearly interested in a future together — after you've been dating for a while, and before you're engaged or too deeply invested to think clearly. Raising it early in a serious relationship gives you time to understand your options calmly.

Definitely before engagement

If you haven't talked about it by the time you're discussing marriage, do it now. Many couples cover it during pre-marital counselling, and it belongs on any list of questions to ask before marriage.

How to bring up genotype kindly

It doesn't have to feel clinical. Try:

• "I've been thinking about our future, and I'd love us to do a genotype test together. Would you be open to that?"
• "I know I'm AS — do you know your genotype?"
• "Since we're talking about marriage, can we go and check our genotypes together?"

Offering to test together, and sharing your own result first, makes it feel like teamwork rather than an interrogation.

Where to test your genotype in Nigeria

Genotype tests are widely available at hospitals and diagnostic laboratories across the country. A few tips:

• Use a reputable hospital or laboratory.
• Retest at a second lab. Results can occasionally be wrong and the stakes are high, so it's wise to confirm at another reputable facility.
• Go together if you can. It removes doubt and builds trust.
• Keep copies of your results.

Avoid relying on an old result from years ago that you can't verify, especially if it came from a lab you don't know.

If you're both carriers

Finding out you're both AS (or another at-risk combination) can be a shock, especially if you're already in love. Take a breath and don't decide anything in panic.

• Speak with a doctor or genetic counsellor who can explain the risks and the options available to you.
• Talk honestly with each other about your values, your fears and what you want for your family.
• Give yourselves time. This is a big decision, and it belongs to the two of you.

Some couples decide to part ways; others choose to marry and explore their options with medical guidance. There's no single right answer, and nobody should be shamed for their choice.

Be kind about it

People living with sickle cell disease, and people who carry the trait, deserve respect and love. Genotype is about planning, not about anyone's worth. Avoid jokes, gossip or phrases that make someone feel like a problem. If someone tells you they're SS, thank them for their honesty and listen.

Good communication makes all of this easier — see healthy communication in relationships.

Frequently asked questions

Can AS marry AS?

They can, but if both partners are AS, each pregnancy has a 1 in 4 chance of a child with sickle cell disease. Couples in this situation should speak with a doctor or genetic counsellor about the risks and options before deciding.

When should I ask my partner about their genotype?

Once the relationship is becoming serious and you're both thinking about a future together — ideally before engagement and before you're deeply invested. Offering to test together makes the conversation much easier.

Can genotype results be wrong?

Errors can happen, which is why it's wise to test at a reputable lab and confirm at a second one. Going together and keeping copies of your results also helps.

What genotype is compatible with AA?

If one partner is AA, their children won't have sickle cell disease, though they may carry a trait depending on the other partner's genotype. A doctor can explain the details for your specific combination.

Date with the future in mind

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