Question Video: Putting the Stages of IVF into the Correct Order | Nagwa Question Video: Putting the Stages of IVF into the Correct Order | Nagwa

Question Video: Putting the Stages of IVF into the Correct Order Biology • Third Year of Secondary School

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The process of creating “test-tube babies” is more commonly known as in-vitro fertilization. Put the following steps of a standard in vitro fertilization procedure in the correct order. (A) Fertilization of the eggs by sperm. (B) Egg retrieval and semen collection. (C) Embryo transfer into the uterus. (D) Embryo development up to the blastocyst stage in a nutritive medium. (E) Ovarian stimulation to stimulate egg production.

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Video Transcript

The process of creating test-tube babies is more commonly known as in vitro fertilization. Put the following steps of a standard in vitro fertilization procedure in the correct order. (A) Fertilization of the eggs by sperm. (B) Egg retrieval and semen collection. (C) Embryo transfer into the uterus. (D) Embryo development up to the blastocyst stage in a nutritive medium. (E) Ovarian stimulation to stimulate egg production. (A) A, B, D, C, E; (B) B, A, E, D, C; (C) E, B, A, C, D; (D) B, E, A, D, C; (E) E, B, A, D, C.

To answer this question, let’s go over the steps involved in in vitro fertilization, or IVF. First, let’s remove these answer choices so we have more room to work with.

The first step of IVF is ovarian stimulation. Here, medication is taken to cause multiple follicles to develop, each containing an egg. These follicles grow until the eggs are mature. In the next step, the eggs are retrieved. The follicles are drained with a long needle in an IVF clinic. In addition, during this step, the semen that contains the sperm is collected by ejaculation. In the next step, the sperm and eggs are combined in a special nutritive liquid medium in a Petri dish. Here, the sperm can fertilize the egg to form an embryo. Now, the embryo can develop in this nutritive medium until it becomes a blastocyst. In the final step, the embryo can be transferred into the uterus, where it may implant and form a pregnancy.

Now that we’ve outlined each step, let’s bring back the answer choices to choose the answer that correctly identifies these steps in IVF. The correct answer is (E) E, B, A, D, C.

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