What are the Assisted Reproductive Techniques practised to help infertile couples? Describe any three techniqu

NCERT Exemplar · Q33

Q. What are the Assisted Reproductive Techniques practised to help infertile couples? Describe any three techniques.

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Concept understanding — Assisted Reproductive Technology

Imagine you have a friend who wants to have a baby, but nature isn't cooperating. Maybe the fallopian tubes are blocked, or the sperm count is very low, or the woman's age makes it difficult. For decades, that was the end of the story. But today, doctors have a toolkit of medical procedures that can step in and help — that toolkit is called Assisted Reproductive Technology, or ART.

At its simplest, ART is any medical technique that handles a human egg or sperm outside the body to help a person get pregnant. The most famous example is IVF (in vitro fertilisation), where the egg and sperm are combined in a lab dish — "in vitro" means "in glass" — and the resulting embryo is then placed into the woman's uterus. But ART is broader than just IVF. It includes everything from injecting a single sperm directly into an egg (ICSI) to using a donor's egg or sperm, or even having another woman carry the pregnancy (surrogacy).

Important

The NCERT textbook (Class 12 Biology, Chapter 4) defines ART as all techniques that involve the direct handling of gametes (sperm and eggs) or embryos outside the body to achieve pregnancy. This is the key distinction: if the procedure doesn't involve handling eggs, sperm, or embryos in a lab, it's not ART.

Why does this matter for a commerce or humanities student? Because ART is not just a medical story — it's a social, legal, and economic one. It raises questions about who can afford it (it's expensive), who gets to be a parent (single people, same-sex couples), and what happens to unused embryos (legal and ethical debates). In India, the Assisted Reproductive Technology (Regulation) Act, 2021 now governs these procedures, requiring clinics to be registered and banning commercial surrogacy for foreigners. So when you read about "test-tube babies" or "surrogacy laws" in the news, you're looking at ART in action.

Here are the main techniques you should know, as listed in the NCERT:

IVF (In Vitro Fertilisation): Egg and sperm are mixed in a lab dish. The embryo is then transferred to the uterus.
ICSI (Intracytoplasmic Sperm Injection): A single sperm is injected directly into an egg. Used when sperm count is very low.
GIFT (Gamete Intrafallopian Transfer): Eggs and sperm are placed directly into the fallopian tube, so fertilisation happens inside the body.
ZIFT (Zygote Intrafallopian Transfer): A fertilised egg (zygote) is placed into the fallopian tube. …

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Assisted Reproductive Technology (ART) encompasses medical procedures that help infertile couples conceive by handling gametes or embryos outside the body; key techniques include IVF, ICSI, GIFT, ZIFT, IUI, and AI.

Infertility affects a significant number of couples worldwide, and modern medicine has developed a suite of techniques collectively known as Assisted Reproductive Technology to address this challenge. These methods intervene at different stages of reproduction—some work with gametes (sperm and egg) outside the body, others transfer embryos directly, and some simply assist sperm in reaching the egg within the female reproductive tract. The choice of technique depends on the specific cause of infertility, whether it lies with the male partner, the female partner, or both.

The main ART procedures practiced include:

In Vitro Fertilisation (IVF) and Embryo Transfer (ET)
Intracytoplasmic Sperm Injection (ICSI)
Gamete Intra-Fallopian Transfer (GIFT)
Zygote Intra-Fallopian Transfer (ZIFT) / Intra Uterine Transfer (IUT)
Intra-Uterine Insemination (IUI)
Artificial Insemination (AI)

Let me describe three of the most widely used techniques in detail.

In Vitro Fertilisation (IVF) and Embryo Transfer (ET) is perhaps the most well-known ART procedure, often called "test-tube baby" technology. The term "in vitro" means "in glass," referring to fertilisation occurring outside the body in laboratory conditions. The woman is given hormonal stimulation to induce the production of multiple eggs (superovulation). These eggs are then collected from the ovaries and placed in a culture dish where they are mixed with sperm from the husband or a donor. Fertilisation occurs in this controlled environment, and the resulting embryos are allowed to develop for a few days. Once the embryos reach the 8-blastomere stage (or sometimes the blastocyst stage), one or more healthy embryos are carefully transferred into the uterus of the woman. If implantation succeeds, pregnancy proceeds normally. IVF-ET is particularly useful when the woman has blocked or damaged fallopian tubes, or when there are issues with sperm quality that can be overcome in the laboratory setting.

Note

The first IVF baby, Louise Brown, was born in 1978 in England, marking a revolution in reproductive medicine. In India, the first IVF baby was born in 1978 (some sources cite 1986 for India specifically, but NCERT does not provide this detail).

Gamete Intra-Fallopian Transfer (GIFT) takes a different approach by returning gametes—not embryos—to the woman's body. In this technique, eggs are collected from the ovary after hormonal stimulation, just as in IVF. However, instead of fertilisation happening in the lab, the collected eggs and sperm are immediately transferred together into the fallopian tube. Fertilisation then occurs naturally inside the woman's body, in the fallopian tube where it would normally happen. This technique requires at least one functional fallopian tube and is often preferred by couples who have religious or ethical concerns about fertilisation occurring outside the body. GIFT mimics the natural process more closely than IVF, though it offers less control over the fertilisation process itself. …

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Same / Similar Concept — real previous-year questions on the same or a closely similar concept, not this exact question.

TG EAPCET 2022Set ap-2022-07-30-FN1 markMCQ
$6-8$
›Reveal solutionSolution
MOET (Multiple Ovulation Embryo Transfer) recovers embryos at the 8–32 cell stage for non-surgical transfer to a surrogate mother. The correct option is (B).

The key idea behind MOET is to maximise the reproductive output of a superior female animal (like a cow) by inducing her to produce many eggs at once, fertilising them, and then transferring the resulting embryos into surrogate mothers. The timing of embryo recovery is critical: too early, and the embryo is too fragile to handle; too late, and it has already implanted or become too large for non-surgical recovery.

Why the 8–32 cell stage? In cattle and other livestock, embryos reach the uterus around the 8–16 cell stage (morula) and continue dividing to the 32-cell stage (early blastocyst) before they begin to hatch and implant. At this window, the embryo is still free-floating in the uterine fluid, making it possible to flush it out gently without surgery. Earlier stages (like 2–4 cells) are still in the oviduct and require surgical recovery; later stages (beyond 32 cells) start attaching to the uterine wall, making non-surgical transfer risky or impossible.

Let’s walk through the reasoning step by step.

What is MOET?

MOET stands for Multiple Ovulation Embryo Transfer. A donor female is treated with hormones (FSH and LH) to induce superovulation — releasing many eggs instead of the usual one. She is then artificially inseminated. After a few days, the resulting embryos are flushed from her uterus without surgery and transferred to surrogate mothers.

Why non-surgical recovery matters.

Surgical recovery is invasive, stressful for the animal, and limits how often the procedure can be repeated. Non-surgical recovery uses a catheter to flush the uterus — it’s quick, safe, and can be done repeatedly. But it only works if the embryo is in the uterus and not yet attached.

Where is the embryo at different stages?

0–4 cell stage: Still in the oviduct (fallopian tube). Cannot be reached non-surgically.

8–32 cell stage: Has moved into the uterus but is still free-floating. This is the ideal window for flushing. …
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TG EAPCET 2021Set ap-2021-08-10-AN1 markMCQ
$Q. Mating of superior male of one breed and superior female of another breed is called (A) Cross breeding (B) Out crossing (C) Species hybridisation (D) Inbreeding$
›Reveal solutionSolution
Cross breeding involves mating superior individuals from two different breeds of the same species to combine desirable traits from both. The answer is (A).

Understanding Animal Breeding Terminology

To answer this question, we need to understand the distinctions between different breeding strategies used in animal husbandry and genetics. Each term describes a specific mating pattern with different goals and outcomes.

Let me walk through each option to clarify why cross breeding is the correct answer:

1. Cross breeding (Option A)

Cross breeding specifically refers to mating animals from two different established breeds within the same species. The key characteristics are:

Both parents are from different breeds

Both are typically "superior" specimens of their respective breeds

The goal is to combine desirable traits from both breeds

Example: Mating a superior Holstein cow (excellent milk production) with a superior Jersey bull (high butterfat content)

This matches our question perfectly: "superior male of one breed" + "superior female of another breed."

2. Out crossing (Option B)

Out crossing is mating between unrelated animals within the same breed. This is done to:

Introduce genetic diversity

Avoid inbreeding depression

The animals are still from the same breed, just not closely related

This doesn't fit because our question specifies different breeds.

3. Species hybridisation (Option C)

This involves mating animals from different species (not just different breeds): …
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TG EAPCET 2021Set ap-2021-08-10-FN1 markMCQ
$Q. Mating of superior male of one breed and superior female of another breed is called (A) Cross breeding (B) Out crossing (C) Species hybridisation (D) Inbreeding$
›Reveal solutionSolution
Cross breeding involves mating superior individuals from two different breeds of the same species to combine desirable traits from both. The answer is (A).

Understanding Animal Breeding Terminology

To answer this question, we need to understand the distinctions between different breeding strategies used in animal husbandry and genetics. Each term describes a specific mating pattern with different goals and outcomes.

Let me walk through each option to clarify why cross breeding is the correct answer:

1. Cross breeding (Option A)

Cross breeding specifically refers to mating animals from two different established breeds within the same species. The key characteristics are:

Both parents are from different breeds

Both are typically "superior" individuals selected for their desirable traits

The goal is to combine the best qualities of both breeds

Example: Mating a superior Holstein cow (excellent milk production) with a superior Jersey bull (high butterfat content)

2. Out crossing (Option B)

Out crossing is different because it involves:

Mating animals of the same breed

But the individuals are unrelated (no common ancestors for 4-6 generations)

Purpose: to introduce genetic variation while staying within one breed

This is NOT about combining two different breeds

3. Species hybridisation (Option C)

This involves crossing two different species entirely:

Example: Horse × Donkey = Mule

This goes beyond breed-level differences to species-level differences

The question specifies "breeds," not species …
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Q.What are the Assisted Reproductive Techniques practised to help infertile couples? Describe any three techniques.

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