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1, The male sperm fertilizes the female egg.
2, The egg and sperm fuse together as one cell.
3, He has a low sperm count .
4, Only one sperm fertilizes an egg.
5, He has a low/high sperm count.
6, Only one sperm fertilises an egg.
7, The sperm fertilizes the egg.
8, The sperm sample is produced by masturbation.
9, It only takes one sperm to fertilize an egg.
10, Conception occurs when a single sperm fuses with an egg.
11, Doctor believed that his low sperm count was the problem.
12, Once an egg is fertilized by the sperm, it becomes an embryo.
13, A donor egg fertilised by her husband's sperm will be implanted in her womb.
14, The sperm sample is checked under the microscope before insemination is carried out.
15, The sperm fuses with the egg to begin the process of fertilization.
16, Modern Western men are producing less sperm than formerly.
17, A whale is killed-a great sperm whale.
18, The test measures levels of ubiquitin in individual sperm.
19, The chief donors to sperm banks were medical students.
20, The sperm cell has no muscles.
21, Ishmael ponders the brow of the sperm whale.
22, Sperm quantity has also declined,[http://sentencedict.com/sperm.html] by about 25 percent.
23, Probably about ten billion sperm in one go.
24, All were then fertilised with sperm from her husband.
25, A school of sperm whales is sighted.
26, Unlike sperm, eggs are produced very sparingly.
27, Any disease which undermines a man's general health will interfere with his sperm production.
28, In human reproduction, one female egg is usually fertilized by one sperm.
29, Each male ejaculation will contain up to 300 million sperm.
30, Genes determine how we develop from the moment the sperm fuses with the egg.
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