PARIS — Parties supporting President Emmanuel Macron will hold an overwhelming majority of 350 seats in the 577-strong French parliament, according to final results of the second and final round of the parliamentary election on Sunday night.

As expected, the mainstream conservative Les Républicains party and their allies will be the main opposition group in the National Assembly — the lower house of parliament — with 137 seats.

The Socialist Party, which controlled the last parliament, will have 44 deputies together with its allies. The far left — made up of the Communist Party and France Unbowed, the party of former presidential candidate Jean-Luc Mélenchon — will have 27 seats.

The far-right National Front, with eight deputies, will fail to reach the 15-seat threshold needed to form a parliamentary group. Party leader Marine Le Pen was elected a French MP for the first time in her home base of Henin-Beaumont in northern France.

Here are four takeaways from the election’s second round.

1. Macron no Brezhnev

Parties supporting the French president’s program will not get the massive majority of 400 to 460 seats that had been predicted by pollsters after the first round results came in on June 11. But the party Macron founded last year, La République en Marche, will have enough MPs on its own (308) so that it won’t have to rely on the votes of its allies from Modem, the centrist party of Justice Minister François Bayrou, who supported Macron’s presidential bid. LRM won’t have the Soviet-style domination of the legislature predicted a week ago. But it will have an overwhelming majority nonetheless.

Macron’s party also won’t have to depend on the support of conservative lawmakers who are mulling breaking away from their own party to join former Républicains such as Prime Minister Édouard Philippe and Economy Minister Bruno Le Maire in the Macron team.

That doesn’t mean Macron will change his strategy of widening and consolidating his political base, which he deems necessary to implement his reformist platform. Even though he insists that his program has been largely sanctioned by the 66 percent of voters who elected him to the presidency on May 7, the president knows that this won’t silence opponents to his liberal reforms. The more support he can claim in parliament, the more difficult it might be for opposition outside the chamber to make its case — in the streets or elsewhere.

2. Abstention challenge

Turnout, at less than 45 percent of registered voters, was the lowest for the second round of a parliamentary election in the history of France's Fifth Republic, which was established in 1958. (Turnout in the first round was also low.) There are a variety of explanations for this, such as election fatigue after a year of constant political campaigning, disenchantment from both core left-wing and conservative voters resigned to Macron's victories, and even the nice weather that saw some people choose a weekend getaway over a voter’s duty. But that can’t disguise the fact that large swaths of voters remained indifferent to Macron's attempt to renovate and overhaul the French political system.

That will not weaken Macron’s capacity to push the reforms he wants through parliament, but it might dampen his ability to muster popular support for the changes — some radical — that he wants to introduce to the French economic and social model.

In terms of voters' sociology, that puts the onus on him to convince the segments of French society who have been indifferent to his personality and platform — the less educated, the blue-collar workers, the lower-income households who have largely abstained, or gone to the far left or the far right.

3. Left shattered

The Socialist Party did better than expected a week ago, but the 29 seats it will hold still mark a “debacle,” as acknowledged by its leader Jean-Christophe Cambadélis, who announced his resignation Sunday night after being soundly knocked out of the election a week ago in the district he had controlled for 25 years.

In the same camp, the far-left movement of former presidential candidate Jean-Luc Mélenchon — who received an unexpectedly strong 19 percent of the vote in the presidential election's first round in April — will have a significant presence in parliament, and will be able to form a parliamentary group if joined by the few MPs from its sometime ally the Communist Party. That will mean significant resources and public funding, which will allow the party to organize and make its influence felt — if not on parliamentary work, at least in the public debate.

4. More women, more youth — and less experience: the new parliament

Macron has succeeded in bringing about a radical overhaul of French political personnel — which now becomes his problem to manage. The average age of the new MPs will be around 47, according to a French TV estimate, or about 10 years younger than in the previous parliament. Half the LRM candidates for MPs were women — which will mean a significant shift in the gender balance in the National Assembly.

Never have so many inexperienced MPs been elected to parliament in one wave, which will pose unprecedented challenges to the new government. The new men and women need to learn the ropes, and to be educated in the arcane world of legislative work. In the coming week, Macron needs to find a president for the National Assembly (he has hinted it might be a woman), the equivalent of a whip, and chairpersons for several influential parliamentary committees. To manage a possibly disorganized or unruly majority, he will have to count on the handful of survivors from the old parliament that joined his party. This is all the more important as Macron wants the new National Assembly to hit the ground running — and start with his already controversial major labor market reform, as soon as this summer.

This article was updated with final election results.